My 565EX died on Sunday, but my two bargain 540EZ flashes arrived today from EBay.
The first one powers on, the screen is really dim, and even firing at 1:1 puts out barely 1:128, the pilot light goes red immediately, so it's obviously not charging up fully. There's also a strange chirruping sound.
The second one powers on, the screen looks fine, the power output looked fine but when I fired it a puff of smoke came out of the top near the bounce/wideangle card! Fired it again (what's the worse that could happen?
) and it works, but stinks of burning, could just be full of dirt, but not sure I want to risk it!
*sigh* so my cheap 3 flash setup is now a 0 flash setup.

I don't know why some people bash products by making broad statements like those quoted. I'd like to have all Canon equipment but can't justify some of the expense. I'm not a total cheapskate, though. I do have a 135L 
Also the smoking 540EZ appears to be the freznel screen, so I've ordered a replacement for that (he didn't want the broken ones back) so hopefully that will be up and running too.
