Not much you can say about a power cell unless you discover your purchase is a dud.
What you want to know is that this performs every bit as well as the "real" thing. I am running a 350D set up and this drives the shutter, motor function (sport mode) as well as integral flash (rarely used apart from this test) easily. My testing used AF just to increase the drain, handled with consummate ease. Recharge cycle in sport mode is excellent and will allow shooting up to the max frames per second spec of the body
Hooked to the mains charges to full in under an hour approx same time as my original. Capacity easy enough to match the originals shooting capacity in RAW mode. I have now recharged sufficently to note there are no "memory" or "dry out" effects in extended use. This is a durable as well as effective solution.
For what I was going to spend on spare batteries, I am now going to save the difference by buying these and use this towards the supplemental battery grip.
Yep folks it's safe to proceed, this one is no lemon.