I purchased this bike 12/10 on a lightning deal, and I have no regrets.
I ride for 30 minutes 3-4 times per week, alternating with a Lifespan rowing machine and a Sole E55 elliptical trainer, but this bike is becoming my favorite piece of equipment.
Previous reviewers have noted instability with high resistance, but at 6'1" and 200 lbs I have had no such problems, even while standing and cranking the resistance as high as I can tolerate. I did have to adjust the leveling feet at the rear base, which may have prevented the instability.
You will need to lubricate the moving parts to prevent squeaking, but once you do this, the bike is whisper quiet.
My kids like the bike as well, and while the 4 way adjustment is not as quick as I would like, it's feasible.
I love the simplicity of the bike - no heart monitors, LCD screens, fans, mp3 connectivity, just a rock solid piece of workout equipment which compares favorably to equipment at my YMCA. I am very pleased with this purchase.