"First time I've used these fittings and found them very straightforward to fit. I used them to re-route some bathroom plumbing, joining into copper at both ends of the run. After two weeks there have been no leaks so far.......... But a word of warning; I was using also the 15mm version in this project and the insertion depths printed on the back of the packet are incorrect, (it's vital to ensure that the pipe is fully inserted into the fitting or leaks will result- it's best to mark up every pipe end so you can check that it is fully home against the internal stop when assembling). I wasted a lot of time trying to insert 15mm pipe to the prescribed depth, before realizing that the depth printed in the table on the back of all the fitting packs should be 29mm and NOT 33mm as printed. The figure of 36mm for the 22 mm pipe is however correct. I've given 4 stars for features- not sure what features a pipe connector should have. They don't make tea or mend punctures but they're very good for joining pipes!"