Loving mine - still have it set-up inside the house. Doesn't look great there, but it does mean that it gets used.
Watching a couple of videos on the Concept site made me realise that my technique was a bit wrong so trying to re-learn. Feel a lot better since getting one and using it. Even a 10 minute row taking it easy really gets me awake and more energetic. Not cheap, but well worth it.
Once I've re-learnt the technique I'll start to vary the workouts.
Basic error in the technique was that I wasn't leaning back after the drive with the legs...i was keeping my back straight. Trying to put the lean back into the movement meant that I really feel my core working.
Anyone have any technique tips then do share...