I bought a mini when they 1st came out and had horrendous problems with it.But with the board and poppet revisions these have been sorted.
Last month I bought a new one and it has had 4 boxes of paint through it with no problems what so ever,not 1 ball break.
It is light,fast and efficent.
I have kept it stock apart from the trigger and it rocks.
I have also had a angel speed 05 and they are also a very good marker if a little heavy compared to more modern markers.You also need LP air for the speed so bare that in mind,the mini will run on either.
Find
Shocking's thread as he has a custom anno speed 05 for sale that a glorious colour.
here
http://www.p8ntballer-forums.com/vb/showthread.php?t=110768