I recently approached to the game and I had to choose which set of rules use. After a DEEP and LONG analysis, me and my friends chose 1ed rules and we'll never come back. No other edition gave us the variety, specific identity for each corporation, chance to customize your units, flexibility in your army list (UWZ rosters are a cage of rules, c'mon), chance to play with few minis, and fastness of play, than the 1ed. In my humble opinion, 2ed was the worst, even if I recognize it the best looking manuals so far.