Just picked up a synth brush and have been pleasantly surprised. Its very soft, has no scritchiness at all but definitely some scrub and loads the soap much quicker and much easier than my boar. It's quite springy though and I'd even go as far as to say that it has more backbone than my boar but perhaps im thinking about it the wrong way. It holds quite a lot of water too and lets go of the lather without a fuss. No need for me to splay every time I re-lather anymore. Nice and different overall. It doesn't replace the boar though, it isn't so superior I have no reasonable choice but to use it, moreso it just compliments nicely.