I had one like this, got it for $20 on Craigslist!
I hate nylon tents - they usually end up just filtering out the large particles so the inside is filled with fine misty dust. The canvas is cooler (for a while, in the morning; better when it's got a shade over it), and warmer at night.
This one held up pretty well for about four years; last year I was out in the open and a big mean old wind came along and ripped one of the corners, which then caused one of the poles to bend. Most likely, several years of washing with vinegar and previous playabuse contributed to the failure.
Now I want a Springbar, am saving up.
What goes around, comes around.