I used some mate only about 20 bags in dark grey thought it was ok I had the water slightly higher than when using Weber but I stuck with Weber as there’s no need for accelerator most of the time , I never understand all these guys using slower setting gear to then speed it all up all time to try get the same day like Weber.,saying that though I suppose if you buy 1000s and 1000s of bags each year it might save some folks a bit with the cost saving of £1 a bag or so
I would use the vpi again though especially if I was gonna over night in winter