I JUST got RB3D... GREAT sim!
You know, I never realized how slow and underpowered those old kites really were untill I started playing this with the realistic flight model. YIKES. The feel IS fairly decent for a simulator... I've never flown the real thing (I've flown "modern" aircraft, including a J3 Cub, Cessena 150, 152, and 172, Piper "Traumahawk," (I HATE that airplane!)

Piper Warrior, Bede BD-4 (experimental, very nice, FAST but looks like a brick with wings) and a Blanick sailplane.) Nice game.
I don't have a VooDoo card, so I'm "missing out" on some of the features- like the transparant cockpit mode- BAH... they didn't have that in the real on. I only fly from inside the cockpit like you really would. Graphics are still pretty decent, and my machine is fast enough to be smooth in all situations.
Still waiting on my rudder pedals, so I'm having to "ignore the ball" for the most part. I think they should be here this evening though.
These aircraft are pretty "twitchy" with small movements, probably just like the real thing. I managed to spin the E-III once... and it recovered easily enough. The E-III is DOG SLOW. I really enjoy flying the Albatross D-II.

Takeoffs and landings are no big deal with either of them. Haven't tried a Dr-I yet... I think I will wait untill I'm a bit better. I have a tendacy to find the ground when dogfighting- getting any altitude in these underpowered kites is a challenge. I realize you can use the intermediate flight model, (more power, better climb etc.) but that would take a lot of the fun out of it.
So far with 3 missions in campaign mode I've shot down 1 aircraft, and damaged a bunch of other ones. Those 2 seaters with a tail stinger are tough- the bite back, and they take a lot of punishment before they go down. The only thing I shot down was a Nieuport 11. I was the only surviving pilot on the mission a couple of times, and now they don't have an Albatross for me to fly, so I'm back in an Eindecker... handles ok but I can't kill ANYTHING because I can't catch them! :'( Also we're usually outnumbered, so I guess that is pretty realistic.
I can never find my home airbase, I always end up landing at another nearby field. :-[ LOL Anyone have any suggestions for finding your way home?
This is the ONLY sim that I think is more fun than the ORIGINAL Flight Unlimited aerobatics sim. Freestyle aerobatics + guns and other planes to shoot at = very entertaining.