While Parallels 4.0 works fine on my MacBook Pro 2.5, it is fairly responsive, works at a reasonable speed, and the connectivity with the MAC is fine too - I JUST HATE THIS PROGRAM. I am a light user of M$ Windows and more than 90% of the time I am not working in parallel. I want to turn Parallels on only when I WANT TO, and I want it ALWAYS in WINDOW mode (NO Coherence mode). However, Parallels knows better, THEY START PARALLELS whenever they decide (there are these two red parallel lines added to some icons - I have no control of that) and BOOM - here comes PARALLELS. MOREOVER - in these case it launches in the awful Coherence mode and a notification “YOU ARE WORKING IN COHERENCE MODE” (no one asks me if I want that - and no one cares what I set in the preferences). Immediately afterwards I am being asked (thanks a lot) if I want to let Windows\Parallels to access my entire HD - which I certainly don’t. Then, when I go back to Window mode - the setting of the window is OF COURSE full screen (and not my default 1024x752). Developers of Parallels - IF I WANTED WINDOWS I would just go and buy a Windows machine. The point is that I don’t want windows, and I use it only when there is a file that doesn’t fit MAC. Remember how OS-X asked us if we want to launch Classic Mode BEFORE booting classic environment (even if we double clicked a classic application of file), that’s the way it should be ! Here take your 1 star as this is what you deserve.