Margin Trading and Lending on www.bitfinex.com

The standard rate lend return is 43% per year. I just lent 300 ltc for a 40% for a 30 day stint, seems good.

I joined up had a poke around, and the engine seems good so far, anyone else bitfinex, have buy/sell positions,

Funds transfer seems good and insured loans looks good, the control on the margin trading seem to work on the small bits of 10 btc trades i checked.

What do you guys think of the site?

How would you improve the margin trading and leveraged engine?