Clegg did come across very well I thought. One of the biggest reasons was that he seemed to be able to back up his claims with a bit more substance than the other 2.
Brown came across surprisingly well, although this may just have been because I had such low expectations for him. Unfortunately, any chance Labour had of getting my vote disappeared when they forced the Mandybill through the wash-up period of parliament instead of properly debating it.
Cameron came across fairly poorly. He kept on blabbering on about "waste", but was only able to quote a couple of fairly tame examples of this. Sure canning the 7% pay rise for NHS managers is a good idea, but it's not going to magically result in billions of pounds of savings. Waste is only waste once you've identified it and explained exactly how you'd save the money. Until then, it's just an empty and substance-less word.
I was leaning in favour of Lib Dem before seeing this debate (I've explained my anti-Labour stance, and our Tory candidate lives over 50 miles away from my town for a start!). This debate has just enhanced that lean.
EDITED: 16 Apr 2010 09:57 by DAVE!!