DualDud,
The MVVS was in favor about three years ago in combat. At that time folks found that you had to buy 3 to get one good one. That one would run very well. They are known for power and durability but not for quality control. The combat community is fickle. After one or two bad experiences with a brand they shy away from them. No one in the US combat series ran MVVS engines with success in the last couple of years so the brand has an uphill battle to convince fliers to invest in them.