Customer Ratings & Reviews

made my internet faster. very easy to install. very compact

Bought to replace an ancient modem that stopped working. Very easy setup - just plug everything and enter the MAC address to an Xfinity app. Restart a couple times and everything connected. No dropped connections after about 6 months of use.

Xfinity increased my speed, and recommended this modem. It installed easily, works great, and I haven’t experienced a single issue since I bought it. Took a while to get used not having numerous status indicating lights!

This product performs consistently as promised/expected.

Great modem, easy to installed, works no problem from purchased, but one cons is over heating problem, blowing with small computer fan may fix it, I will give it 4 and the half stars.

Outstanding performance cable modem that handles 400mps from Internet Provider and is more than adequate for the demand of a 5000 square foot home with multiple fixed and mobile Smart Electronics. Note, I upgraded from an Arris SURFboard DOCSIS 3.0 that struggled a little. Hopefully, this modem will meet subsequent technology jumps.

The original Xfinity modem was giving us internet issues. This modem (paired google WiFi pucks) improved our internet by a lot!

Great modem. Worked well and set up was easy. It is so small compared to my old modem and it has only 1 light. I would have liked it in black versus white which is a very minor complaint.

Xfinity upgraded my Internet speeds so I decided to upgrade my modem. This is the first time I was able get it connected the first try. App is helpful to have too. Speeds are as expected.

I needed a replacement for the cable modem/router combo I have been renti g from Cox for years. Just finally great tired if the lack in performance and bandwidth issues we've had at the house. This with the combined purchase of a Netgeat Orbi mesh system made the upgrade pretty easy and I no longer ned to rely on repeaters to extend the wireless at my house. This modem also future proofed me since it is a DOCCIS 3.1 modem and I have the capability for expanded bandwidth if I choose to upgrade my mesh network in future. This was the best cost effective purchase and setup was extremely easy.

The S33 modem has been installed about 1 month and so far performance has been outstanding. I use Comcast internet service with about 1 Gbps available. Setup took about one hour working with Comcast tech group by phone. Possibly their new Xfinity app will permit an easier method to register and activate a new modem on your account. I didn’t try it. But other than the initial setup this modem opened up internet traffic with my TP-Link router and connected devices have worked smoothly. Some reviewers complained of excessive heat from this modem but not for me. It does get warm in operation but not hot. It’s not cheap but I highly recommend.

This thing helped a lot to get a better internet quality/connection, I use this one along with my TP LINK router and it works awesome!! Considering the fact that I live at a rural place, with tons of trees, getting signal is a little bit stressful sometimes, but this thing made a huge difference, please consider that there are 3 60”+ TVs in my house, 3 computers, 4 cellphones, 2 people playing video games and doing streaming on platforms sometimes, very recommended!

Saving on my cable internet and getting great speeds. Use a router with a mesh setup already so didn't need xfinity gateway so saving money every month. Simple setup!

Installation was easy. The mpdem does exactly what it is auppose to do and the 2.5Gbit port is great. Got it on sale so its way better than what Xfinity would have provided and saves me significantly more money as well.

So it was on the pricey side but well worth it. This modem is lightning speed and will keep you ready for the future. I absolutely love it and would recommend it. However, as more modems become available with this capacity I would expect some price drop because it was a lot for a modem.

Great so far, works with Optimum cable in NY (they didn't even ask me what modem when I called, they only wanted the MAC). Provisioned in like 3 minutes, was pleasantly surprised. Speed has been great, getting what I paid for.

So far so good! This modem is capable of 2Gb/s and has been incredibly stable. I don’t like the “all in one” options being provided by ISPs and prefer to manage my own hardware. My only qualm is that it doesn’t have a power button, so power cycling is done by removing the power cable; just a small gripe so it’s not worth docking a star. The UI is fast and easily digestible. Overall I’d say it’s a good modem and would buy it again.

Nothing much to say beyond strong performance and stability. Only thing to say is that it gets decently warm, but haven’t seen any impact to performance.

Worked flawlessly. Setup went smoothly with xfinity (performed everything online, no phone calls needed). Was on 600 mbit plan and saw same connection speed as before. Then upgraded to Gigabit plan (also online). Within minutes was running on those speeds. Using 2.5Gbit Ethernet port on the cable modem (and the rest of the home network supporting), saw around 1.2Gbit speeds from the gig plan. In the month since installation, everything has been perfectly stable, meaning no reboots have been necessary and no unexpected network drops. Modem appears very stable. Modem also connects very quickly as compared to some previous models.

This was a great replacement for my aging modem and allowed me to access greater speeds from my service provider. Extremely easy to set up and get running. No hiccups. I have very limited tech skills and luckily didnt need to use my limited skills. Follow the simple 4 or 5 steps included in the packaging and you are good.