I don't really agree with delikurt in that you don't really need to work on technique, it takes a hell of a lot longer than 2-months to really get the right form on a clean.
Even after 6years of oly lifting I'm not that great at pointing out issues, however, the ones that I did are as follows:
1) You don't really get your hips through at the end of the second pull so you finish the movement at few inches short of where you should. This is massively reducing the power you're generating and making the pulls look very much one speed rather than a steady first pull and explosive second pull.
2) You don't move your feet out on the receive position. This stops you sitting between your legs which in turn stops you from keeping a tight arch in your back. The result is that you end up bending forward slightly to catch the bar. This will cause you to lose heavier heights that you can't muscle up. Often this can be caused by doing lots of power cleans, as it's easy to get into bad positions when receiving the bar.
Anyway just my 2cents.... I'm sure there's far better guys out there who can provide some more pointers...or even correct mine if they think I'm wrong!