I've been closely following Jonathans recommendations for summer tires, but I'm not always after outright grip. I had the V105 tires on a GT86 and absolutely loved them for their progressive nature at the limit, and therefore how playful they were.
The V107 feels similar, if a little higher outright grip. Difficult to unstick on the road but perhaps this'll change with a few miles on them.
On track in the dry, these really surprised me, their relatively high grips levels didnt drop off even after 15 minutes - impressive for a road tire! They also didnt melt, however the central rib of the tire showed a wedge effect - unclear whether this was lack of camber (2.3deg), or running slightly too high pressure (32hot).
They provide excellent feedback, so you know whats coming - even at moderate road speeds.
They have relatively high noise on the motorways however, so don't expect a comfy touring tire like the PS4, but the tradeoff is the feedback/communication is better.
They feel similar to the Premium Contact 6 (but grippier, however this could be because they're new), but weirdly , quieter! Loved the PC6 for dynamics (even stiffer sidewall on PC6, says my tire fitter), but they didnt last so well on track so i'll be sticking with the V107 for a while as a great dual purpose tire.
Haven't pushed on in the wet yet, but seem fine on the road and inspire confidence.
Would recommend the V107 for those who value feedback and being progressive at the limit! I'll update this as more miles get on them.