couple of things I noticed with masterxchange

-super high fees          followup:(they lowered them, they are acceptable now)
-6 hour withdrawal times
-they sell your msc to pay for withdrawal fees instead of just using the btc balance
-they send payments without miners fee    followup:(did eventually confirm)
-cant cancel pending withdrawals

I will be doing direct trades instead now.
PM me if your looking to buy MSC


followup: they emailed me saying they will refund 0.035 (~$25) for the withdrawal fees. thanks