I use Woosh 256k - 1GB limit - $40 - and have severe latency problems. Nobody at Woosh can give me any idea what is going on or a real estimated fix time.
Woosh is ok for what I currently use if for.... web surfing, email and the odd download. Surfing is less painful than dialup and download speeds are significantly better than dialup. I am in a marginal coverage are and use a booster antena. It is currently useless for streaming, voice over internet or gaming.