Tested with Dan Dare, Dynamite Dan 2 and Light Force. Ingame speed is good, but animation isnt smooth, sound is choppy and so silent, game wont load every time, Dan Dare freezed after 10 minutes of play...
Am not playin couple of month but speed, sound and stability is been definitely better before. I dont remember which version of emulator is used then, but am sure that is something wrong now.
If you could please, give back everithing as is, from two month ago.
Test configuration: Athlon XP 2200+, 768Mb, WinXP Pro, Opera 9.27, 9.52, IE6, FireFox 3.0.1, latest Java

best regards,
Pegaz

Games tested with 3 different machines: Saboteur, Flying Shark, Bomberman, Wild West Hero, PacMania, Pinball Wizard, WEC Le Mans, Supertest, Impossaball, Licence to Kill, Moon Alert, Dynamite Dan, Roller Coaster, Panama Joe, City Connection.

Test with Centrino Duo laptop: working ok.

Test with P3-600Mhz: inappropriate speed in all of them, excluding City Connection and Panama Joe. A few games won't load at my first try.

Test with P4-3Ghz: inappropriate speed in all of them. Very fluctuating speed in Wild West Hero, Pinball Wizard, Licence to Kill, Roller Coaster and Panama Joe. Supertest won't load at all. All games didn't start the first time they were selected, except for Dynamite Dan and Panama Joe. These two games stopped working in some point of the game (emulator freezed).

Other comments have been submitted from here on:
http://www.worldofspectrum.org/forums/showthread.php?t=20661&page=56

Regards.

P3 1Ghz -> Speed is better
P4 Core2 Duo -> Speed is okű
Now the emu is playable :)