I shocked my wife the other day by saying: "I love this phone" about my Note 5. I've never loved a phone, they've always irritated me somehow. Maybe it's the phone, maybe it's this version of Android/Touchwiz - whatever, I like the phone.
I had reservations at first because of the non-removable back and inability to add memory or change the battery but I find battery life is good and you can get external battery packs that last forever. As for the memory issue, I picked up a cheap mini-usb to SD card adapter and it works well but for an even easier memory add on you could try a wireless stick which looks like it would be awesome.
No problems with mine after over a month of use and it's tougher than it looks. I did get a Supcase Unicorn Beetle case for it and a tempered glass screen protector. so far, so good.