1st Edition was a decent squad-size skirmish, but suffered from a lack of restrictions that led to broken min-maxing and choices that didn't match the fluff.
2nd Edition worked best at platoon level, IMHO, but could be stretched to about 50-60 figures a side before becoming too clunky. Better balancing in the basic lists that came with the game, but the army books outpaced those, and since there were only two released before the company folded, it wasn't great fun to play anything (except maybe Dark Legion) against Bauhaus or Capitol.
I used to be more in the 2ed camp when it came to figures, since there were a huge lot of excellent Kev White sculpts in there, but recently, I've grown more fond of the 1ed ones which have a distinct 2000AD vibe in many aspects and thus came in quite handy to supplement my Foundry and Warlord figures for that universe.