Went for this based on its price as the Dell replacement battery was too expensive. It was a tight fit and the lock button on the lap top does not now close properly meaning the battery is stiff to remove again, but that is a minor point, as it works perfectly and for its price I can accept that.
Dell wanted to charge a zillion quid for one of these for one of our developers & I just really didn't want to pay them it! We're delighted with this so thanks very much & we'll be back for the others!
I bought one of these in Jan 2012. It worked fine for over a year. For the last few months it hasn't really been keeping it's charge and can only be unplugged for a few minutes. I'm now buying another, but disappointed it doesn't last longer. It may be the memory effect thing (should wait for it to mostly discharge before recharging) but this should be more clearly stated if it is a problem. Not a rave review, it's just OK