Hey eppo,
The Catalyst for sure is one of the best wave kites, if I go for a dedicated wave sesh, the Cat is the one I choose for all conditions. On shore, off shore, side on, side off, it works well in all directions.
The Cat isn't as grunty as the Kahoona or other Delta's but it's light weight and direct responsiveness is pure gold. The lightweight translates to the ability to change directions almost instantly and allows it to drift predictably when lines ocassionally go slack, come to think of it, I don't think I've ever had one drop in the waves and I slack line regularly.
The Cat has ample depower and the ability to shoot forward to the edge of the window if you need it to, but can quickly be downlooped back into the action.
Bottom line is that when I get into the thick of a heavy situation, I often switch off my conscious control of the kite and just ride the wave. The Catalyst allows me to ride the way I want without worrying about the kite. Complete faith in the kite being there when I need it.

I sell other great surf kites too, but this is my pick for my style.
DM