Gaslow Refillable Bottle System

I would like some information on the Gaslow Refillable System.  Has anyone had this system fitted or fitted it themselves to a motorhome and if so do you think it was worth the initial outlay or not.  Also has anyone had any problems refilling the bottles when in Europe.  I have a 2002 Rapido and the skirts are fibreglass so not very thick to take the filler nozzle and I have heard that you can only fill the bottles from an outside filler not from one inside the gas locker when in Europe.  Any comments on fitting/using this system would be appreciated.