I can comment on the computrainer. I still enjoy mine after several months. It has been very beneficial for keeping my fitness stable with a very demanding schedule.

The training effectiveness is very good. I generally ride in the Multi-rider program because it is the easiest to do. I have several preprogrammed training routines for Tempo, VO2 Max and Intervals. The one thing about the computrainer is that the computer allows for no "dead" space in your stroke. The computer maintains the selected power regardless of the gear or cadence and forces you to have a smooth solid workout. I promise you that a simple tempo ride will strain your legs the first time you do one. There is no give in the effort.

The programs especially 3-D offer varied terrain and graphics. I actually have raced my evil twin around a "okay" graphic of central park and a great ride through the desert southwest. There are many programs that you can do to shake up your training. In one week I might do a Tempo ride of 4X15X3, a VO2 interval ride and finish with a one hour tempo. I have sixty+ different workouts that I can do so boredom is not a question.

The most complicated part of the system is the setup. You need a computer, (a laptop is the best...just for portability). There are three cables to run along the bike frame. I have strapped my #2 bike into the trainer fully wired and leave it there. It is a greater hassle than simply plugging into a trainer or slipping on to a set of rollers. If you find the right group they can help you through the setup and the training programs.

I believe that the computrainer provides the most solid fitness gains with the least amount of time.