I love the idea of carrying an extra tank which is why I love my pony bottle. The thought of carrying an extra 80 cf tank is even more exciting.
But if I never plan to do any serious tech diving, would there be much that I would get out of this class? (Although this may sound like a rhetorical question, it's not meant as such.)
Sidemount diving is really catching on around the country. Jeff, for example, dives his sidemount configuration in all sorts of situations. He hurt his ankle badly skydiving and sidemount allows him to easily enter and exit the water. From shore you step into the water and then attach the tanks...it's easy to do btw. From a boat you can enter the water and then have someone hand you your tanks...as long as the water isn't too rough.
Sidemount is a great travel config too. It's lightweight and accommodates the standard Al80 easily.
You get more air for longer dives and added safety.
It's easy on the back, knees and ankles since you don't have to lug the tanks down to the water on your back.
There are reasons to dive sidemount in wrecks and caves for technical purposes, and this is why the config was developed in the first place. However, it has come to be recognized as a terrific configuration for pure recreational diving also.
Jeff wrote the class and dives sidemount regularly. Paul has been diving sidemount for years...he is the reason Jeff is coming to Austin in the first place. You won't find a better pair to learn the technique from...for recreational or technical purposes.