I'm really impressed by the way Polo has held on to 70% of XMR volume...
MintPal has picked up only about 15%... and is even lagging Bittrex.

The MintPal interface actually sucks in heavy use...
It's klunky... and you're always paging... and as much as 25% of orders entered just disappear into the ether...
It blows my mind that they do 5,000 BTC/day (though those awful captchas are gone).

Even though I'll have the APIs working soon... why would API trading be any more reliable?

All 4 platforms Mint, Polo, Cryptsy, Bittrex are a joke...
Compared to a proper broker platform like Interactive Brokers TWS with .NET API...
I do $100,000 trades every day on the NYSE and CFE...
It would be totally reckless to do even $5K or $10K trades in Alts.