Very solid and fairly easy to assemble. But... once I got it assembled I tried to watch the two supplied DVD's ( Level 1 Workout & Cardio Workout).. neither of them would play in ANY DVD Player. Really needs these to fully understand how to use the damn thing. Yes, there is a wall chart with pictures.. but really need the video's to really understand how to use it safely. Very disappointed to spend this much money and get poor quality DVD's that won't play. Called Stamina for replacements, seems like they know there is a problem, and they said would send replacements. We'll see...