I bought the Siamese System when it first came out, and all these years later I don't have many good memories of it. First, it seemed rather broken. Amiga96 the menu never worked properly and was hard to set up.
SiameseRTG looked nice until you realised that only really workbench, Visage (the image viewer), and a few other minor things can use it, because it's hardcoded to a patched CyberGraphX 2 library. Want to use 24 bit datatypes? Forget it. 15 bit games? No chance. They either crash or show wrong colours. And the whole thing broke totally under OS3.5 and above. It only works with OS3.0 or 3.1.
Then there was the file transfer thing that let you directly use files on the PC drive. While it was nice, it's not nearly as flexible as Samba. Lose Amiga multitasking for a moment, for instance, or go offline, and the thing died and wouldn't come back until you rebooted. And it didn't handle international characters either.
The only thing I really haven't found a better replacement for was the remote Windows MCI control and the ARexx ports. Those were pretty good, and worth running Siamese for alone. But 2.5 doesn't really make these much faster.
If you want 2.5 then go ahead, it's a nice enough improvement over 2.1. But I wouldn't pay through the nose for it, if I were you. It's not worth it.
