Back to topic. I have recently been using a Ashbys V2 steam mate with my TM as my heat exchange has been bypassed awaiting repair.
No way does it produce the heat of the TM heat exchange, it just couldn't keep up, I'd get good heat after putting the wand down for a few mins, then it would go Luke warm. But this was at 350 psi, on a 100 psi portable maybe it could keep up better.
Btw I just gave away my steam mate to Ashbys, sent it to them for repairs then hand a list as long as my arm of things wrong with it, costing £480 had to tell them to keep it as I have only sold it on for 200. Not worth the £20 posting it back to me.
I have heard the magna is not so relieible either.
All in all they seem temperamental little things, I wouldn't buy one again.