X-Pert pole owner questions

I'm pretty sure I want to buy an X-pert pole. Is it still wobbly like some other poles? Have you had problems with the pressure mounting?---I know new X joints too. Are you comfortable doing inverts on it, would it be ok for learning a shoulder mount on it?  I'm used to chrome poles at the studio also. Don't know if I should just stay with what I'm used to or try brass. I hear brass is better for grip, do you still have to spend time "warming up the pole"? Can you still spin easily with brass, or is it a tradeoff? Hoping to make a decision by tomorrow, I've been going to a studio for about 1 year. Thanks