Sora shifters really wind me up... their design means you can't upshift from the drops.. one of my constant bike test niggles along with shitty wheelsets on top end bikes.
Being as I rarely use the drops, I don't find that a problem. Of course, I know they are cheapo but, in comparison with my ultegra set on my GT, they seem just fine. Probably won't be able to say the same in 10 years though! (the age of the GT)