... sounds great but the unique way of playing it will take a bit of getting used to - since there's no point in playing a cadenza from a keyboard I've been experimenting with getting the note data in first without any cc data and then recording the cc data using the modwheel/expression pedal "live" so to speak into separate tracks. I then tidy this using a graphics tablet - this last thing seems essential for SSV.
Re: I've been using SSV for a couple of days now...
like any instrument, a learning period is expected before beautiful music can be acheived. I do a very similar thing that you are doing, I record the notes first with the keyboard, then I go back and play the expression pedal and mod wheel. For me that works best. I would recommend putting all the data into the same midi track not separate ones. In the event that you want to share your track with someone else, it will play properly on their system, provided they have the SSV.