I don't have personal experience, but if you look through the ebay feedback, people are reporting positive feedback for this battery and vendor. For the price, I don't think I'd personally have a problem giving this battery a shot. Once received, I'd cycle it a couple of times to make sure it doesn't have the issues that others have mentioned in this thread...which is a good practice regardless of how well known the battery vendor is.
Otherwise, if cost and lead time are prime concerns, an option that I always consider available to me is my local BatteriesPlus, which has a wide range of 12V SLA batteries to choose from in the <$30 range (although a charging unit is another $25 or so). Yeah, lead is heavy but not so much the smaller ones.