Despite my earlier criticisms, I can imagine a niche where this engine might (and I emphasize might) shine.

Looking at the twin engine Velocity rolled out at this years' air show, imagining two of these tiny engines with appropriate tin nacelles; and further imagining said Velocity pressurized for 10,000' cabin altitude at 35,000'...

Maximum hp available up there from both engines would be around 120hp - enough for a brisk but not amazing indicated airspeed bus with a 70 knot true bonus for thinner air @ 2 knotts / 1,000' SWAG.  Climb would be brisk with 480hp at takeoff, so you needn't spend too much time in the "oh my god were bleeding fuel!" altitudes.  With no cooling drag, you might see 250 knots TAS for roughly 16gph - which is not altogether unreasonable for that speed - and the light weight would help you get up there in a hurry.  At 16gph with the tankage in a Velocity you could travel a good long way.

Bill