The site is awesome, just a little "bitching":

The order book graph could just show the relevant part: anything further than +/- 10% of the current price is meaningless, as by the time the price gets there most of the orders disappear. This way the graph in the important range could be bigger and easier to read.

And my laptop isn't really new but chrome is using some 30% cpu when the page is open. It would be great if you could optimize that.