So far installed only the front. It made the bike much more planted and secure compared to stock setup and I'm very happy with the improvement. I'm confident the rear will be up to par with the front.
Note that these springs do lift the bike a decent bit and extending the sidestand will be necessary. Also would appreciate a bit more oil in the delivery - what came was just a bit more than required, an extra 100 ml would make my sausage fingers less worried about spills.