Excellent service from the reseller, this arrived within three days of order, well packaged in foam. The battery does all that it should and holds a full charge for around 2.5 hours, so I am very pleased, especially considering that it was around 35% of the price of an Apple replacement. BUT, for those who care about such things, it is not identical to the Apple product. It is a brighter shade of white, so does not match the Macbook body perfectly and is a loose fit compared to the original battery. Not a problem which affects the functionality of the battery, but some people may consider these cosmetic shortcomings worth the extra £65. I do not. A good substitute, not perfect so only three stars. (And £65 which stays in my wallet!)