Have an Xtreme. Yes they work and yes they are way overpriced for what is essentially propagator with a little pump. For soil i would not bother as moving from the cloner to soil slows things down. Straight into lightmix never fails for me.
Its set to 27.
in summer would run the 10' at full speed, with lights on of course.
Lights at night helps when the weather is really hot i have to reduce to 400W