I've got fairly limited water crossing experience, but TC in mode 2 works well. I've done a few in mode 1 when i forgot to switch, and got across ok, just was a bit dicey because it made it hard to keep up momentum with the power constantly cutting out. My experience is in water about a foot deep (over the footpegs) and maybe 10m wide crossings. Round river rocks about fist sized. Standing up and letting the bike move under me worked best, especially when the front was getting deflected around a lot.