They are really good, although I'm yet to purchase a reproduction set 'technically', I have bought the Classics/FansProject Ultra Magnus and MusicLabel Soundwave upgrade sets and I've gotta say, they are awesome quality.
Aaron, the bloke I've dealt with, is a very patient and pleasant bloke to converse with and was more than willing to explain to offer advice and help.

Some time in the next quarter I intended on making a large purchase, Like a ridiculous amount of G1 Reproduction stickers , so I might post here if anyone would like to join me in a group order.

Perhaps, if anyone has the time or will, members could post some pics of what they've repro'ed or upgraded? - I'll try and take some new shots of my Magnus and Soundwave shortly.