cerberus,
Yes, near universal on a Walther forum, but you'd expect that now wouldn't you.
I've heard of but one test where the two were shot side by side, and the Walther grouped marginally better as I recall. The rest is fodder for rants and flaming regarding which is "better." Get the one that you like.
Not sure about the reset, I only have the AS to work with.
Regarding conversion; I haven't heard of that. Probably since the P99 is already available in 9mm. You could get a 9mm slide, spring, and barrel, but I imagine it would be much cheaper to just buy the 9mm version. I do know that .357SIG conversions are available for the .40 chambering.
My chamber locks up solid, and is fully supported. The slide can move slightly on the frame.
I've heard of the SW99OL, but I can't keep up with the alphabet soup of variations, even with the Walther version. Try this website for more info:
http://www.praxagora.com/lunde/WaltherP99FAQ/index.html
Yes, near universal on a Walther forum, but you'd expect that now wouldn't you.

Not sure about the reset, I only have the AS to work with.
Regarding conversion; I haven't heard of that. Probably since the P99 is already available in 9mm. You could get a 9mm slide, spring, and barrel, but I imagine it would be much cheaper to just buy the 9mm version. I do know that .357SIG conversions are available for the .40 chambering.
My chamber locks up solid, and is fully supported. The slide can move slightly on the frame.
I've heard of the SW99OL, but I can't keep up with the alphabet soup of variations, even with the Walther version. Try this website for more info:
http://www.praxagora.com/lunde/WaltherP99FAQ/index.html