Having L950 myself (previously had a L920) and I have to say I'm far from being satisfied with it. My L920 was way more reliable than the L950 is. Is it because of W10M? Probably. We can see there was not as much caution put into the 950 than it has been into the 920...
I'm still deeply in love with my old 920 (tho it has passed away...).
The camera is as well the weaker point. Not the image quality, clearly. I love the quality! But at some point i'll launch Camera or take a pic, and my phone would reboot. It doesn't happen everytime, luckily. But kinda randomly.
Since few months now, I got those random reboots, as well. I bought a new battery from eBay, still waiting for it to be delivered (stuck at the Customs since July 4th...). I would blame W10M for that, tbh, cause some battery problems occurred on my laptop as well, around the same time. Like my laptop battery wouldn't fully charge since I updated to Creators Update. And my battery problems on my phone started when I upgraded it to Creators Update, as well...
I'm not a technician, so I won't say it is for sure W10M, but that's what it seems to me. Maybe it kinda killed the battery at some point and there's now no turning back?
No idea...
I also experience lags, bugs, needs for a reboot, sometimes. The Facebook syncing with People app doesn't work really well (probably a software problem). I'm still really mad at this Apple apps bridge. Why developers should bother to make a W10 Universal Ap, if they can just use this bridge?
Never had those problems with my L920. We sure didn't have all those fancy apps, but it was more reliable, and that's what I'm personally looking for...
L950 has a great hardware, though it has been less taken care off than previous Lumias. Really bad software in my opinion. Would give it a 4.5/10 : 8/10 for the hardware (cause it's not all good, but mostly), 1/10 for the software (cause it's not all bad, just mostly).
I wish I could have my L950 with Windows Phone 8.5 on it... *_*