i have used both logi and a4tech for now. just got myself the G9 by the way have been using the logi kebod and wheel.

my opinion the a4teach does what its supposed to do, so does the logi. Both are great products. Though logi come at greater price.

all in all if u have the xtra cash to splash than by all means go for the logi. It will last u. If not the a4tech will also do just as fine and great for the purpose.

just my 2 cents........

ive been using the G15ver1(bought while i was in UK) and the G25 both from logi and they are serving me well til today. If u can ever get ur hands on one 2nd hand G15ver1 dont think bout it just get it. Just my opinion......