I have Performance
MiniMax.
It's quite similar to Sigma Jet.
Main differences between Topeak RoadMorph are..
Cheaper, you can get it for $10.- on sale.
Hose retracts unlike Morph.
It doesn't go as high(to 105psi) as Morph(140psi).
It takes less strokes(about 85 strokes to 105psi) of pumping to get the same pressure than Morph.