Sony XB300 Headphones. Opinions?

Bestbuy.ca, Click Here

Some say its uncomfortable, some say its sound isn’t as great as the XB 500 or 700s. I can probably agree. The main difference between all 3 in the Extra Bass series is the driver size, 30mm, 40mm, and 50mm. the 300s got a 30mm driver size.

Has anyone tried or owned the xb300 before? I’d like to hear some thoughts on this before I head out and purchase out in a compulsive manner.

Best buy is selling them for $40 until March 25. Not knowing its sound quality potential or possible discomforts of wearing it in long sessions, should I buy it for now?