oldgoatroper
Roper of Goats. Old ones.
I have a self-healing mat on my 4x8 easel, but I imagine that it would be kinda "soft" for squeegeeing.
This has not been my experience, at all. We have a 5' x 10' work table with a 5' x 10' mat on it -- I've never found it to be a problem when squeegeeing anything. Make sure you get one with a grid on it -- you'll find the grid indispensable after a while. Our previous one lasted about 5 years and became bulged and broken where it was used more... we just cut the remaining good part up into smaller (almost like new) pieces and covered other surfaces in the shop...
Also, blades definitely last longer... a nice little bonus.