The first one I had about three years ago, can't remember the model, it just never felt good. I have written about my experience with the 2005 Marathon SL a few times. To me there is no excuse for a $625 fork to be bad out of the box, however it does happen. It shouldn't happen to so many of them though. Anyway, when I called Marzocchi the day that I received my fork and told them about all of the flex and about how it made a clunking noise they acted like they had never heard of it before, even though I knew three other people that had purchased the fork and had the same problem. Anyway, they told me that I could send it in for warranty and I would get it back in around four weeks or so.
To me this was completely unacceptable. Receiving that "nice" of a fork and then having to wait that long for warranty before ever even getting to really use it! To me it should have been replaced once they received it back. That's not how they work though. They did finally admit that it was a problem with the TST, also ended up admitting it was pretty common.
I ended up using the fork for about a month, listening to it clunk every time it compressed and watching it flex more than my SID. Once I had a few extra bucks I went ahead and ordered a Fox F100x, it is twice the fork the Marathon is. I then sent the fork in for warranty, waited about three weeks, got it back and put it on ebay.
For what it's worth one of my friend's / guy I race with had the 2005 Marathon SL as well. I asked him if he had any problems with it last year, said nothing major after he received it back from Marzocchi getting the same problems fixed that I had. When I talked to him a couple of months ago he told me he had ordered a new fox. Said since he told me how nice of a fork the marzocchi was he had had nothing but problems with it. Said it was a total POS.
Oh, one other thing. Ya gotta love it when the nice decals come off of the fork when you remove the backing but it takes an act of congress to get the warning stickers off.
*note - I know people that had the 2003 Marathon SL's and the 2004 Marathon SL's. Those were great forks. I loved how the lockout worked on them. They should have left them alone instead of "improving" them.
I may be fat but I'm slow enough to make up for it.