My very first kites were Slingshot "Stealth" foil kites - 5.8m and 4.4m. I believe they were the first kites Slingshot made. Basically two line kites with a 3rd line to collapse the kite. Clearly SS had no idea what they were doing and the bridling made the kite fly quite deep in the window. In combination with no depower this made staying upwind impossible. I used them for a couple of years for snow kiting - even on the snow they were impossible to use as they pulled you violently downwind as soon as you picked up any speed. As I was new to kiting I didn't have any way of knowing how bad they were.
Following that I bought a Naish Sky Pirate AR 3.5. At 9m it wasn't powerful enough to get me going until the wind was so strong that I was overpowered.

That was followed by a PL ARC, which was somewhat better, but it wasn't until I bought a couple of Wipika Airblasts in 2001 that I started actually kiting with some measure of control.