I DL'd the demo and played a few rounds against the bots.
I like the weapons! They have the look/movement/feel of the UT2k4 guns w/ added thump, yet killed like UT99.
The "Minigun" was the nuts!!!
Shock Combos were slick!!! And easier to pull off.
Rockets seem to have a UT99 style timing w/ UT2k4 spread (3 rockets max ALT Fire). They killed very quickly, even w/ one to the face.
Flak - Has a slower rate of fire...not as spammy as UT99, but damn lethal.
Sniper - I actually got used to using a bolt action sniper playing Day of Defeat Source...so I felt right at home w/ the new sniper. Extremely powerful!! It does fire a tracer round, so you won't camp long w/ it.
Pulse - The ALT Fire looked more like green lightning...I loved it!!
Goo Gun - I will always hate the Goo Gun...LOL
Movement - Not as clunky as UT2k4, but not quite as tight as UT99 but hey, I'm not going to bitch until we get some low gravity going. I thought the reg gravity UT3 was better than the Reg Gravity UT99, so I'm thinking Low Grav UT3 will be awesome!