Very straightforward to use. Trim the end, fit the insert, push into the connector and lock in place. If using the superseal insert, it does take more effort to get the pipe fully inserted but the marks on the side make it easy to see when the pipe is fully in.
Refused to ship to a Scottish island, keep money for a week, so could not order elseware.
Been using speedfit pipes for years. Never had any problems
I have only ever once had a pushfit joint fail and it makes a terrible mess and it was not using speedfit pipe and fittings. Since then I have only use speedfit pipe and fittings, in the short term it might cost a bit more, but longer term..............