I have been using Ubuntu Mate since the 16.04 and am a totally blind user. I run the LTS versions as it is important that accessibility is always working. 16.04 had great accessibility, and all I can say about the new 18.04 when I checked it out on someone's computer is, the accessibility blows me away. I came to Ubuntu Mate from Windows 10 and had been involved with helping test accessibility on that platform. The degree to which the team of Ubuntu Mate cares about accessibility, and the fact that you want it to work well for visually impaired users, is totally evident from your hard work on this distribution. The Brisk menu works well and the whole system is useable. There are a few small issues, but they are so small in comparison that in the end it hasn't effected my use of the OS. I sincerely hope that you continue to focus on accessibility in the future. Ubuntu Mate is very quickly becoming an alternative OS that visually impaired users can switch to! Keep up the great work!