Using it in a Canon 1D Mk111 1st impressions are that it's a very good replacement battery for the Canon LP-E4 All battery functions are recognised in Camera and there is no problem with charging in the original Canon charger. It also seems to hold it's charge quite well if left for any length of time. If I had owned and used it longer and was still getting the same results I'd have no problem giving it 5 Stars. At this price it's got to be a bargain.
This is one superb piece of kit from Garmin. I bought this to use with the Nuvi 200W and it's just a shame Garmin didn't supply this with the Satnav instead of the Windows mount. Once you've used this you'll never use the Windows mount again.