Whilst this is a pretty quiet section of the forums, I thought I'd start my posting with what is clearly a minority opinion.
I personally think Cyberspace was the best cyberpunk genre game that ever came out.
Better than Shadowrun (1st, 2nd, 3rd, 4th edition). Better than Cyberpunk (v1, v2.0.2.0, v3). Better than GURPS Cyberpunk. Better than Underground. Better than CyberHero.
Cyberspace glimmered with style. The character professions were evocative (Sleaze, Tech Rat, Net Junkie etc) as were the class backgrounds (Arcologists, Middle Corps, Space Colonists, Sprawkids). The CIRS was sickening. The system had just the right amount of detail, sufficiently detailed and yet relatively simple to implement. The technologies were gorgeous. Rick Lowry's interior and Vietch's cover art was just superb.
The support material was good too. Edge-On was an excellent set of short adventures. Death Game 2090 did all sorts of wrong things to my player's minds. Cyber Skelter was challenging and twisted. Europe, Death Valley and Chicago were excellent in the detail and utility.
OK, Body Bank, Sprawlgangs and Cyberrougues were pretty lite-on. Actually they were bloody awful.
But the rest of Cyberspace was great!