Fran,
No there's nothing wrong, I'm 100% sure I used the Hyper Canvas output, And I don't like it that much, the sounds are ok, but compared to some HQ soundfonts they are crap.
It has some sounds that sound ok, but they are a lot less than some sounds in some soundfonts.
Fluid 3 for instance has a great grand piano (samples are taken from a Yamaha P200), great choir, violins etc., some sounds are even better than in a $3000 keyboard, and the average midi file sounds really great using these soundfonts.
The advantage you have is that you can use different soundfonts for different midi files.
So you can make midis sound the way you want them to.

Greetz ,
Marcel