I’ll be honest with you my ping wasn’t very good last CBT, but I’m going to try WTFast this time and even with high ping I was able to enjoy the game.
I think is worth if you buy 9.99 pack, if you enjoy you can always make another steam acc and buy a better one since TOS is free to download.
TL;DR - Can’t assure you a good ping nor stable server on a Beta Test, but the game is enjoyable even with 300ms ping.