If you want the best of mpg and the best power VVT it is then.
I would set it to come on at a certain rpm if I were you, ie higher up vvt on for power off lower down for cruising and mpg/emissions.
I have no experience with the omex, so don't know how adjustable it can be made on this ecu, but on others such as emerald it works extremely well, so so long as it has the feature should work fine.
tabetha