Anyone ever use one of these

Not the one posted but I do have true refillable 1lb propane bottles. they have an allen head on the vent valve and use a screw on head hooked to a 5 gallon tank turned upside down. easy to fill and don't need to chill, just fill till it spits out the vent and I check for weight as well.

I have refilled the disposables, when filling I use a set of forceps to pull up on the vent valve till it spits, no need to stick in freezer that way. but eventually I've had the disposables leak.