I am very pleased with my purchase. I got this on sale for 200 dollars, and it is well worth it. The 521 seems to be advertised a bit more and seems to go on bigger sales, but to me having 2 USB-C ports and the slightly higher battery capacity makes it a better overall choice for me. My intended use case is to power a small portable car fridge (Pictured with power station) when the car is not on during my road trips so that our car battery does not drain, but the refrigerator continues to operate when the car is off. This is a really slick product in that you can use it while you charge it. You can also use the included 100 watt charger (AC or DC car charger), in addition to a USB-C input of 60W netting you a total of 160W of fast charging if you use both the USB-C and the power adaptor at the same time. The fact that they include a power adaptor for home and car use is a fantastic choice. Long term I plan to Purchase a gas generator and 100W solar panel to help this product serve as an emergency use item for around the house. I am particularly impressed by the fact that the display measures both electrical input into the device, and output simultaneously. This gives you a very accurate understanding of what your devices are using, and also it projects out how long the battery will last based on the current draw from the battery. The integrated light strip is perfect. It is not insanely bright, and it really does not need to be. For those that are curious, it draws 3W from the battery. While this power station cannot power more power thirsty appliances (there are heavier, larger and more expensive options for that), the 522's smaller and more portable size makes it a great starter when getting into emergency preparedness. The 10-year heavy use life expectancy of the battery makes this a better buy. In all, at 200 dollars, this was a tremendous value, and I am confident that it will serve my needs quite well.

Exceptional performance, with very nice grip to hold it, i used some other portable power station, but this is one of the best product i ever used. The best feature is, it tells on the display, how many watts the charging product using.

Before talking about this great power station, let me alert you to instructions you need to follow to the letter. At the bottom of page 2 of the manual you are instructed to charge the power station to 100% before using. Mine arrived at about 80%, so I ignored the instructions and then spent a half hour trying to figure out why it wouldn't deliver any power. I finally noticed a hard to read sticker on the back of the unit that said to "Activate" the unit you first had to recharge it (completely). After doing this the power station worked perfectly. This power station is well suited for home power outages, travel, and camping. It has a good collection of outlets to serve most needs. I particularly like the included "night light". It draws only 3W, and provides adequate lighting for a small area - see my photos of it in a dark kitchen on and off. It can provide about 62 hours of light if nothing else draws power. This can be very helpful during an evening power outage. The unit is relatively small and lightweight, making it useful on long car trips for small items needing power the car can't provide. Finally, it is clear that this power station can be an essential item on camping trips! I find this power station to be a very good buy.

Small but mighty. Have for an emergency situation but also use often to charge devices when in unconventional locations.

I love it. We experience random power outages. So having this comes on a clutch. I even take it out to the field and the beach.