what makes you wish you had used glass?
I used clear class, but I worry about its durability.  Quite frequently at parties, I'm making sure my guests are using coasters on the cocktail cab, and I do have some special cleaner for it as well, however it is a plastic, and all plastics will scratch (more than glass).
Just like my "scratch-proof" lenses in my glasses....   

Other than that, no complaints.  Of couse going the plexi route is much cheaper.  Just buy a sheet at your local home depot, and you can cut it yourself.  I used a jigsaw for the corners and a dremel for the finishing touches.