Pros: durable and steady. 9 excellent programs to choose from. built to last.
Cons: very heavy, not too graphical, but does the job.
I've tried many newer models but none impressed me like my trotter 540. It may look older than it should, but it's power and smoothness makes up for that. The 9 programs are versatile and easily programmable. This definitely is recommended for those with any type of respiratory or heart troubles.