This is my first Marantz A/V receiver, and I love it so far. I've had it for almost two weeks now. I still own a Denon A/V receiver that I bought five years ago that cost approximately $1000 more than this receiver. (In case you didn't know, Marantz and Denon are owned by the same manufacturing company, D&M Holdings.) Due to my lack of attention to the dimensions of my new entertainment center when I ordered it, I quickly found out that I really needed a smaller A/V receiver than the massive Denon receiver that I already owned. Thus, when I saw that Marantz had made a line of "slim" A/V receivers, I was quite interested in buying one. Fortunately, I researched that they were releasing the NR1605 this July, so I opted to wait for it rather than to buy the older NR1604 right away. Initially, I was worried that I might be losing quality due to the price difference between my Denon receiver and this Marantz receiver; but then again, technology and manufacturing has improved a lot over the past five years... Thus, when I compared the basics such as power handling, etc., the two receivers were very comparable. The Marantz receiver, obviously being newer, has upgrades such as more HDMI inputs as well as 4K capabilities and built-in wireless and bluetooth. One thing I honestly never liked about my Denon receiver was that setup was very cumbersome in regard to assigning the HDMI inputs (and I consider myself pretty tech savvy). This Marantz receiver makes setup a breeze... I had my PS4, Wii, AppleTV, and cable box up and running in literally minutes. The online music function, which allows Apple AirPlay as well as access to internet radio such as Pandora, is also a very nice feature that I use quite frequently. In regard to performance, it sounds great for both movies and music. Although one other reviewer commented that it doesn't seem to have the same power per channel as larger receivers, I honestly can't tell a difference between this receiver and my larger, slightly more powerful Denon receiver. I have it hooked up to a Bowers & Wilkins 5.1 speaker setup (CM10 towers, CMC2 center channel, CM5 surrounds, and ASW10CM subwoofer). Of note, I have my front speakers bi-amped, so I have not tried the multi-zone function of this receiver and cannot comment on how well that works. I also have not tried setting up the iOS app on my iPhone yet, but based on the other reviewer as well as the app rating in the app store, it doesn't seem like it's worth much. However, in conclusion, if you're looking for a small, but powerful do-it-all A/V receiver, I highly recommend buying this receiver.