The fire and the way it developed on the plane was quite nice in B17II, as was the double skinning technique they used.
Unfortunately that's all it had going for it. The way they created their terrain was horrific, even on my PC today (AMD XP2000+, 768MB PC133 SDRAM, GF4 Ti4200) the terrain is slow to be drawn when you pan around or switch gunner stations really quickly.
The crew management and norden bombsight were also cool and provided for hours of entertainment (especially when you setup the crew with realistic damage properties, and the guns of both LW fighters and the B17s defensive fire with realistic damaging abilities).
The game's customisability in that area was amazing, a lot like modding Doom or Half-Life.
Anyway, it's unfortunate Wayward had to release it half baked and it only got 2 patches out before the plug was pulled on both further development and them.
-SW