I think you might be expecting too much from a VTEC controller... it's reasonably easy to install if you don't mind wiring things yourself and whatnot. How good are you at electronics?

As for power boost... none to little. Unless you're running a different-than-stock setup with a raised/lowered redline, where you would need to adjust the VTEC engagement. Honda's factory setting is pretty good as it is. Someone correct me if I'm wrong, but I've never heard of or met anyone who improved times by changing VTEC engagement alone.