The only cat-back I saw in that price range on Summit's website was one made by Thrush. I'd imagine it sounds (at best) like a Dynomax Super Turbo cat-back. The tailpipes will be aluminized and not stainless, and they're probably straight-cut tips rather than slash-cut. Probably not the best fitment in the world, either.
I'd only get it if you're dirt-poor (like me) and you just need to have SOMETHING for a cat-back just to pass inspection or make the car drivable. (I only considered that set simply because I have the crappy stock single-outlet exhaust on my '84 and I don't want to sink a ton of money into my DD Fox.) Otherwise, even if you swap out the mufflers later on, you're still stuck with ugly, poor-fitting tailpipes.
You're better off piecing together your own cat-back, IMO. Buy a set of Walker 2.5" flowtubes, a paif of 2.5" offset inlet/outlet mufflers of your choice (I'd recommend a pair of Magnaflows, or something similar), a set of Dynomax stainless tails, and some hangers (if needed), and then assemble it. Actually, if you shop around and get the right stuff, you'll more than likely come out with a setup that costs the same or even less than a packaged cat-back system and will look good, sound just the way you want it to, and fit nicely.
Tailpipes - about $150/pair
Mufflers - anywhere from $15 to $75 apiece ($30 - $150/pair)
Flow tubes - $40 or $50/pair
Hangers (universal clamp-on hook-type to work with stock rubber hangers) - $10/pair from Autozone
TOTAL: Anywhere from $230 to $360
