Open-cell wetsuit helps reasonably well. Produces a slippery surface, but it is sometimes difficult to get enough material from the syringe to all the places where it is needed. It does its job, but I don't think it's as easy to use as a water bottle mixed with some suitable conditioner / soap.
The life jacket cuffs work really well. Easier to put on and saves mashes from unnecessary tearing.
Not tested yet
Makes it easier to put on a wetsuit.