While the UX concept is really nice everything else feels pre-alpha and should definitely not be sold as a commercial product yet. There's so much lacking (You want to import SIM contacts? Sorry, but maybe in a few releases.), Ubuntu Phone is just not ready for use as an everyday phone.
If you want to get this phone, expect around 5 crashes and 5 additional reboots a day (unfortunately it will also really crash while being on the phone). I'm saying this as a not too heavy user.
I really hope things improve and I can switch back in a year or so, but right now going back to Android was the best thing I could do.