I have just bought a 70hp Tohatsu, but can't yet tell you about how good it is because its sitting in the garage.
I have heard however that, as a result of their simplicity they are robust and reliable, spare parts are easy to get and generally cheaper than other outboard brands (although that doesn't seem to be the case with the control box...£385!!!
) and Tohatsu UK are very helpful etc.
A wise man who can be seen around these parts and goes by the name of Pete7 (we are not worthy) told me that their weak point is the coils. These however are cheap and easy to replace!