When you first buy them they are ok.
Made a turbo down pipe and double V6 exhaust thats it, nothing else, caput.
Started to struggle with the feed about 1/4 in to doing above, says it all.
They use the cheap and nasty liner so that needs changing with a few hours of use.
More importantly wire feed problems, though not as bad as SIP. Got totally p...ed with mine i ripped the M6 nut through the plastic and needed a panic job the other week. No joy had to resort to the moles and never worked since in any fashion. Had to silver solder a miller draw bar.
So if you want to waste £200 brand new, your choice.