I thought I would give Firefox OS a try, I have used Android and iOS previously and I was interested in another operating system to play around with.
I had also tried an early version of Ubuntu Touch. I'll probably discuss this another time, but needless to say I was rather underwhelmed and expected a bit more but I'm sure this will be smoothed out over time.
Certainly Firefox looks an interesting prospect, and I like the way it works. I have to say they seem to have nailed the webapps more effectively than the current Ubuntu offering.
The device was cheap, but actually operated efficiently. Any device that has web access can view these type of webapps and it is surprising how good many are, after being so used to using native apps.
I am awaiting a big update promised by Mozilla any time soon; I think it is perhaps fairer to comment when that update has been released.