A fair implementation of DikuMUD with graphics, stable with relatively few bugs for a MMO in beta. That may be damning with faint praise, but as the man said, “I’ve already played Warhammer.”
I don’t know how much any of us are going to be able to say meaningfully from the open beta. You cap at level 20, and if you reviewed Age of Conan up to level 20, it was the game of the year. While level 20 is half-way to the cap here, half your leveling time is usually the last 10 levels, and holy crap they needed to add a cap of “half the levels” for a 10-day open beta? Is there some way to get open beta access without paying or having had closed beta access? It seems like a strange name. Anyway, these are thoughts from level 6 (class and RvR).