Works well now I have got the hang of it, but I had to learn by trial and error as the instructions for use are almost non-existent. The unit was shredding my trainer tyre until I experimented and tigHtened the roller more against the tyre, to a calibration factor of 15.
The link to my iPad is a bit erratic, and the iPad app has some bugs. However, once you manage to get a downloaded route working you get quite a realistic effect as the gradient changes, and an enjoyable workout. I can see myself using it a lot over the Winter, and the route videos will keep me interested.
MerlinCycles.com gives it the best price in the internet! Very versatile and vivid trainer with no wires at all. Spent quite a lot of time looking for the sweetest pot available on today's trainers market. Seems like I found it. With its electric motor brake (versus feeble electro brake on i-Flow & i-Vortex and mighty but expensive motor brake on i-Genius) and possibilities such as the new Tacx iPad app this chap will keep you motivated during long winter evenings and wet rainy days.