A good port of a good game. The slow pace of R6 fits perfectly on mobile, but all out gun fights are still as exhilarating as the PC original. Optimization is also great, my phone is crap, but the game runs well nonetheless, none of them pesky frame drops are gonna ruin your fun.
My only gripe with the game is the potential grind to get operators for f2p players. Unlike the PC original, each operator now has a rarity attached to them, the higher the rarity, the pricier they are. What this means is you have to shell out more real-world cash for them if you want to unlock them outright, or use the ticket system to grind for them, and getting tickets for high rarity operators is a fight and a half, not to mention you can still get tickets for operators you've already unlocked.
If you want the R6 experience on mobile, this is it, but pray that your favorite operators are of common rarity, or you'll be grinding for a while.