After conducting a pretty exhaustive search of the best ellipticals on the Internet, from review forums, and company site comparisons, I decided to purchase the EFX 5.23. My product arrived in perfect condition, and the assembly instructions were straight forward and easy to understand. I had the unit assembled in about 45 minutes. The quality of the unit is remarkable. Even on a carpeted surface, the EFX 5.23 remains completely stable. I have been extremely impressed with my workout experience in the first few times using this unit. It is wisper quiet, the console is easy to understand and operate, and the heart rate sensors actually work (unlike my previous unit). I highly recommend Precor's elliptical crosstrainers to anyone in the market for quality exercise equipment.