A few days ago I decided to buy a bq Aquaris E4.5 Ubuntu Edition and after a few days of use I think I can make an little review of the phone.
It is clear that the bq model is not high end, so I do not think that the performance-related issues are the priority here, for this reason I will focus on usability.
I will start with the conclusion: currently, this phone is not for novice users or people that is simply seeking for ‘something that works’ out of the box.
When I say this, I do not just talking about the lack of classic WhatsApp (Ubuntu installs Telegram by default) but I’m talking about the lack of maturity (logic anyway) throughout the product, you can find strange bugs at all times, like lost connection when moving from WiFi to 3G, unresponsive applications, notifications failures, etc …
Even with all these problems, I think ubuntu phone adds very interesting things like the concept of scopes, a kind of configurable full screen widgets which displays information about specific topics.
As I said before, my recommendation if you want to get an Ubuntu Phone is don’t do it thinking as a passive user, because you’ll be disappointed for sure. Buy one if you want to try something new and you want to tinker and be a part of a testing community. If you dare, I recommend that you join Ubuntu Phone and Ubuntu Core Phone Apps teams or enter to the ubuntu phone channel on freenode IRC servers to be informed of all the software updates and have the community and developers support.