I love mine, they are what I use 90% of the time now.
I'm happy with the RBA's now too... when you get used to carrying and using something so small it's so hard to go back to (what feels like) a massive mod and tank set up.
.... also I fixed the one which had the button 'break' by taking that apart, I'm not sure what happened but I think it just got snagged somehow because it's working fine now. I have a 3rd on the way (the new silver/carbon job) which I'm just going to put away.
@Crewella did you ever sort your RBA issue? Do you want me to send you one of my little adapters to see if that's the issue? I have 2 of them and I only ever use one (that's permanently attached to my RX Mini for building them)