Decent value really, and it holds more charge than the battery that came with my phone... but that's not saying much!
(The story behind that is my Desire only held charge for 14 hrs max, with average use, and from long initial charges and run-flats, and with non-essential background data/connectivity turned off etc. I spoke to Vodafone, who I got it directly from, and said I can only think it's a dodgy battery as friends with desires can get 24hrs easily with similar use. Vodafone were actually really helpful, once I'd pushed the point, and said I could just get a new battery, take the receipt to the local Vodafone shop, get them to verify it all, and they'd refund me the money. They did. Interestingly no high street phone shops sold the batteries at all so I had to get it online... which was always going to be cheaper anyway. I now get 24 hrs out of the phone now with moderate/normal use, 36 with light, and maybe 12/15 with heavy use. You'd probably get 48 hrs with minimal use.)