I had three of the speedpress mats at my old job (24' table)
Used them for over 7 years. Had the grid printed right on them.
Went on my own in 2002 and bought one for my 4x8 table.
This one came with a separate grid on thin plastic you lay underneath.
It's fine till using it. You can flip them when needed.
Since they come rolled up, it might take a day or two for it to lay flat.
I set my heat gun on it "one time" .... made it balloon up a little in a 4" area.
After you use them a while, there may be little sharp spikes show up from cutting.
Just slice them off with a razor blade.
Never used any other than the speedpress brand, so can't really say others might be just as good for less money.