wingsandsword
Legend
The gaming groups I played with used a lot of it.
The different NWP system was much better, letting characters get a fixed number of points per level to spend on skills instead of just getting one new NWP every few levels.
The subability system was a min-maxers dream, we used it, but we knew it was broken beyond belief.
The custom class system was at first a nice way to swap out abilities that would seldom get used. DMs seldom used Thieves Cant, and Read Scrolls was a nearly useless ability for rogues, so they would typically get dumped for better weapons selection or a better THAC0. Clerics typically didn't cast many of the more obscure spell spheres that they got, so those would get traded out for better weapon and THAC0 too.
We didn't use the ability to create custom classes after it became clear that was way too easily broken. I once saw somebody create a character he nicknamed "superman" with the Cleric rules by basically creating a fighter (full weapons, full THAC0, full armor), with some key thief skills, and still have healing & buffing spells, and a good number of special abilities that basically made him a multi-classed do-it-all character that still progressed using Cleric XP.
The High Level Campaigns book in the series was mostly good, but it's preachy attitude that magic items shall never be bought or sold ever for any price was heavy-handed. I still use it's demographics guidelines for how rare high level characters should be (1 in 10 is 1st level, or has a PC class in 3.x terms, 1 in 20 is 2nd level, 1 in 40 is 3rd level and so on, with 20th level characters by that progression being a little rarer than 1 in a million in the population). It had some abilities for high-level characters to take as NWP's that were a precursor to Epic Feats, and was the only setting-independent book for 2e on high/epic level play (Dark Sun had Dragon Kings, and Forgotten Realms had Arcane Age for setting-specific high-level stuff)
