I have imported plenty and sold loads and all good reports. I use them myself in my 22, sx3 and SC hong nor. All perform very well.
Loads of punch and last forever.
I have melted a couple of them in my SC as running a 5,5t and its 4x4, but not in normal racing, jus when open practice and got them a little hot, lol.... but only the plug section and they still work perfectly.
1 set take a little longer to balance than the rest but thats all.
6 sets and all charge to 8.40, run great and are way more powerfull than the "legal" cells i have, and for club meetings/big non brca events, etc, you dont need brca legal lipos anyway.
I love em for the money!