Leon stands a little over 7 inches tall, though he is crouching a bit. He's in scale with most of NECA's other Resident Evil figures, naturally. You can look at my pictures of him next to the Palisades figures to decide if the difference in scale there is too much for your tastes. NECA really tried to match him to the source material of Resident Evil 4, so he's a decent likeness but wouldn't look out of place amongst any of their film-based figures, either. As a SDCC exclusive, he does reuse some parts: the head, lower body, and hands from both earlier versions of Leon.
Leon was definitely a cool con exclusive when he came out, and if you're looking for the best Leon in his Resident Evil 2 police uniform for display, this is probably it. Just be careful, as he does seem to be a bit fragile. I'd consider that most folks buying him now would certainly just be standing him around, so I'll give him a good. He does look very nice on display- it's really a shame NECA has never released a Claire to go along with him. NECA's really seemed to sit on the Resident Evil license- they've had it for awhile and, other than the Resident Evil 4 figures, they've been pretty sparing. It amazes me that Hot Toys can sell $200 versions of Resident Evil characters like Wesker and Jill, and yet NECA has seemed to feel there's no market for those figures. Baffling, huh?