I just got these as I am going overseas and wanted something wireless, portable, light, comfortable, and with NC for the plane and while I am out and about but also when working from a Cafe or other noisy space. Also, I wanted something where I could take and make calls where background noise would be minimised to myself and the person i am speaking to. The Sony WF-1000XM3's I have just were not acceptable to me for this purpose in any noisy area. The other two headphones I had on my potential list were the Sony WH XM4 and XM5. Ultimately I went with the Bose 700's for three reasons... 1) I like the sound signature, particularly once i've EQ'd it 2) The case is way smaller than the Sony cases which are bricks in comparison 3) the call quality is amazing even in noisy areas. People I have been calling have been reporting great experiences listening to me.
PS: I also currently have a HiFiMan Sundara, Focal Eligia, AKG Studio 240 (Austrian version, my 1st headphones so sentimental value rather than great sound and they are comfy) so I like to think I know what music should sound like. PS(2): I've also had the following wireless headphones Bose QC35, Beats over ears and B&W P7 Wireless. PS(3): I use Apple products so be aware of this as I note some posters say it sounds better on Apple than Android.
A couple of things I like about it:
1) This thing is really good at separating out instruments and has quite a balanced sound (NB: I am using FLAC files generally but even in highest quality Spotify I was surprised). Very happy. I'm not a fan of the Sony sound... I find it a little muddy, the base a little uncontrolled and the mids too low but also separation of instruments is not great and it sounds a little closed in. For people like me who's musical taste is pretty broad (Salsa, Flamenco, Garage Rock, Post Punk, Classical, R&B, Hip Hop, House, Opera, Swing music, 80's pop, Funk, etc) balanced and separation matters alot. I also found that break in is a thing with these and sound gets better the longer you listen. Out of the box it sounds quite harsh with way too much treble. Once broken in it sounds great. In regards to bass, easily fixed using the EQ (+4 for me) and head placement must be correct i.e. you must ensure a nice seal otherwise the bass sounds light, I had the same issue with my Eligia's and so I knew it was definitely a thing to look out for.
2) The call quality has blown me away, even in noisy places. Someone will tell me the XM5's are better, i'm happy with these.
3) I love the compact size of the case. The Sony cases are bricks in comparison and it was a major decision point for me (top 2 actually). Why have a wireless portable headphone if it's actually not portable with a case? These things cost alot of money, you should be able to protect your headphone with a case in a bag without it taking up a ridiculous amount of space.
4) Battery life at 20 hrs is reasonable. Yeah, it could be more, but I just can't imagine a situation where I would be using these so long that I wouldn't have charged it before the 20 hrs was up.
5) Comfort is great. I find comfort is really head driven. Not as comfortable (but not by much) as my QC35's were but infinitely more comfortable than the P7 Wireless. I've been using these for 3 hrs straight right now and still feel great.
6) I love the ability to pair to two devices. Paired with my laptop and my phone right now.
7) The ability to cycle through NC modes via the button is great. I love buttons, this touch thing that is everywhere (even in cars) drives me a little nuts.
I am aware 800's are probably coming out this year but I needed something now due to my trip and prices were being discounted so had to pull the trigger.
My two cents.