I used, but no additional feeling.
Just like Bitstamp, LakeBTC is only support Bitcoin virtual currency, and not any additional function ( e.g. lending, short, margin etc ) except buy and sell. But I think this is perhaps one of the success factors of LakeBTC and Bitstamp.
Add one, Bitatamp and LakeBTC both are the gateway of Ripple.
https://support.ripplelabs.com/hc/en-us/articles/202847686-Gateway-InformationBut there are more different places, I believe the verification is the biggest difference, I'm annoying on bitstamp that they actually ask me where are my bitcoins come from? That's why I have been not to Bitstamp for a long time.