I'm making some smaller units that can be rolled around and joined together. The only reason for the size (5'x4') is that I snagged 4 5'x4' unframed windows for cheap. I've had a regular table for the past 3 years and I forgot how much I missed working on glass... the cuts are like butter and won't scratch, it cleans easy and it can double as a light table.
Here's a picture as they are currently ( and only 2) I plan on painting them, adding a shelf below and adding casters. Excuse the mess, its a work in progress.