I'll put this in simple terms
Gas is sh*t for these reasons:
1. Less powerful, i.e. it is far less responsive compared to petrol and has a very laggy feel on the accelerator
2. Increased consumption compared to petrol, I get around 200-250k's out of a tank and I rarely give it a bootful
3. wears your engine out quicker
However, there is an injection system for gas that costs around $2000 that supposedly has no negative effects, i.e. less responsive, less economy...
If your using gas just to get to A-B, then its awesome, especially the $20 tanks weekly as opposed to $50 - $80
but if I had the money to put 2 tanks of petrol in my VS S-Pack each week then I would do it...unfortunately, uni students like me are pov.