i have some of these and they are OK, nothing special.
the performance seems to vary from charge to charge - nothing major, but sometimes the pack feels less punchy than at other times.
Also, the first pack I ordered from these sellers came within 5 days. The second pack I ordered never arrived. The seller was quick to refund though.
So, with the money that was repaid, I bought these:-
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWNX:IT
Not tried them yet though.