No thanks. I have about 10 housings ready to fit. I have been refilling the single use canisters, it works but you need to keep an eye on the TDS. I think having them mounted horizontally causes issues, the TDS will creep up to 30+ give the canister a shake and it'll go back down to 1 or 2. Rarely have I seen it at 0.
Because the canisters are much smaller than the bottles that they have replaced it is difficult to tell if they are as efficient. Only time will tell.