I only learnt about this e10 to e25 price jump for a refill when i got a refill today.i did think e10 was hardly worth it for them, but i think e25 is to much.It will soon be cheaper to get mixed gas from paul the guy "silenus" talked about on this forum.he'll be doing bottles for e20,in which case i'll only be carbing my beer with co2 and then connecting the mixed gas for everything else,so instead of refilling my co2 every 6 months or so i'll only be going back to them for a refill maybe every 2 years.or maybe just use the mixed gas for very thing.25 euro for a co2 refill is to much