What's written below still stands, this is a year on update. The battery was pretty much what I expected for the ultra-cheap price - a stopgap. A year after buying it, it still works, but a full charge now lasts about 10 minutes. So my laptop is OK while plugged in, but I can't realistically use it unplugged, although it does give me enough to move from place to place etc. I have had no problems with over heating or some of the other things described on here. For me, the battery is not good quality, but probably, realistically, better quality than I would expect for twenty quid!
I read the reviews on here and had some reservations, but the prices were so low I thought it worth a risk and ordered a battery for my Toshiba Satellite. Despite the .co.uk address, the company is based in Singapore and my battery was shipped from there (the only reason they lose a star - they should be more open about this). I received an e-mail the same day with a Singapore post tracking number, delivery took a week. The battery is as described (a compatible, not a Toshiba, which I expected for this price). It works and holds charge as described, I went for the cheapest option which lasts for between two and three hours on full charge depending what I'm doing. I believe the rest of the reviews on this page, looks to me from the other reviews that this is not a rip-off company, just one with poor quality control and poor aftercare if things go wrong. They are incredibly cheap and you get what you pay for. I thought £20 for a new battery was worth a gamble and for me it paid off. Summary: Good initial communication, fast delivery, product is as described. Some others don't seem to have been so lucky.
To reply as a company, please log in to your business account.