Red nails are always a safe card and when Christmas is getting closer and closer I use it more. OPIs A to Z-urich from the Swiss collection is a berry red that looks very mild. It also got a bit of brown in it I think.
I think it is a nice color, but not fantastic. There is no wow factor, but it is suitable for those occations where you want something colorful but needs to be a bit more subtle.
The formula is good, nothing to complain about there. And it is opaque in two layers.