The casino wheel has already lost its luster. i rolled seven times (total) on two different servers. Stamina on a server with hundreds of extra stamina, 1 lab token, level 2 topaz, level 3 emerald, 2 million coins (twice), and 1000 reputation. Nothing of interest; certainly the guild chests are better.

This is clearly a "High Risk, High Reward" option. Usually players get junk. Really high value items are possible, at very low odds. Real problem: the floors are too low.