Anybody tried/used them ?

Yes. I now have a couple of dedicated loads using White River LR primers. They are good primers.
Also did a small test comparing identical loads in a couple of calibres where the only difference was either WR LR or Federal 210 primers. All rounds shot with almost identical accuracy, velocity and POI at 200 yds. I think you could do a straight swap of Federal 210 for WR LR in most instances.

One thing with WR you need to watch is that their primer cup is taller so in some brass the WR don't seat below the level if the case base. Check your brass to see which brands allow seating to the right depth and you'll be good.

I also bought some WR Magnum primers but have not yet tried these.

FWIW, I just measured:

WR LR .030" (tall)
Rem LR .034"
Win LR .027"