I've had the
SJSC Ergo Control Bar End Grips on my bike for just under a year now, 10 miles commuting daily, a two week tour and weekend rides.
I've found them a little tricky to get in just the right position, and have never been entirely happy with how my hands sit on them. Saying that, I get very little problem with hand discomfort, and the longer the ride the less I seem to think about it.
The rubber they're coated with is very grippy and comfortable but sadly I've worn it through on the lower part of the grips where the palm sits when you're in a more upright position.
On the whole I think I'd probably recommend trying them anyway, the price is right after all. I still haven't decided whether to buy a new pair or go for the more expensive Cane Creek option now mine are worn out though.