I've used the PhotoEquip products before and can attest that they are of extremely good quality and their service is excellent. Their grip is made from a solid billet of aluminum alloy and screws onto the bottom of the M. It does not replace the bottom plate as does the Leica grip. The only thing that you should realize is that when you need to change the M240 battery, you now have two things to unscrew – the M Grip and M bottom plate instead of one. Other than that, I do recommend it.