I use it as a mix of personal/work use but since I bought the phone myself (not required by work), I'm a consumer. I'd say if you're a WM fan, and can spring the money for it, it's a great buy.
As with other WP (and other phones in general), it has some kinks. Some first generation bugs I guess. I finally got all those ironed out and I've had a fully functioning phone for almost a month (first bought it 2 weeks prior).
As a consumer device, it's meeting all my needs. Syncs up to my car's Bluetooth to play music from Groove. Cortana is working well reading me my texts while driving. Has all the apps I use and everything on Edge has been working for me (including Google owned websites). Phone runs very smoothly and is fast as W10M can get. I've done side by side comparisons with my 1520 opening the same apps on the same Wi-Fi and the x3 is only a bit faster, noticeable but not omg fast. I attribute that to the OS though as the 1520 never opened even stock apps that quickly. The build quality is also amazing and I think it's a pretty shmexy looking device. Shame I have the silicon case covering it up. The size is perfect (coming from a 1520) and still makes people go wow when they see it.
The camera leaves a lot to be desired. I've used it mainly for work (taking pics at sites) so it's done the job seeing as everything was stationary. Trying to take pics of my dog though, forget about it. Shutter takes too long and can never get a clear pic. I'll leave that to my bro and his S7. Taking videos is pretty good though, even in low lighting. I would have no problem using this as a video camera at a concert or just watching my dog do stupid stuff.
As an everyday phone for the past month, it's been stellar. It's capabilities compared to my 1520 are not immediately noticeable but one thing that has definitely stuck out to me has been the battery life and efficiency. The 1520 was no slouch, but browsing Readit for 20min on the toilet made it warm, Netflix, running a few apps at the same time. All caused significant battery drain and a lot of heat. Even the screen would get hot sometimes. The x3 does not have this problem at all. I go to bed with it at 100% and don't charge it again until an hour before going to bed the next day. Even then it still has at least 40% left (that's about 22-23 hours of use with 7-8 of idle time). I have a 40 min commute twice a day where I'm Bluetooth streaming music. Text often, calls a few times, email more than anything, Reddit browsing, GroupMe, edge browsing and to come home not worrying about battery life is great. Charging once a day for less than an hour is crazy and the phone never gets hot.
You can find my experience with Continuum in other posts and it's been positive so far. Works seamlessly with my work/personal tasks.
I sincerely hope this phone is viable for the next few years. My 1520 lasted 3 and would've kept going probably. I really don't want to get rid of this phone sooner than I need to.