Yes, I did. I played for almost a month and then it got wiped. After that no more wipes , not in the rest of the closed beta, not in open beta, not ever. Closed beta and open lasted for about 3 months each?
It depends if u were a geek and make all ur quests daily like I did and then some, sure u would have a head start before others. But it a game where u can buy as many packs as u wish with $$$ , that's just a minor "boost".
You can't compare mir with a card game , or any other game tbh.
Mir's a game where if u get a head start in lvl and kit it's game over for the others because they will always be behind. They will farm the bosses and caves that u and the others who had the start advantage left behind. You will move to harder caves and farm better kit, and pk them if/when they come. And so on ..
Just my 2 cents.