Summit exhaust systems, are they decent?

tti makes a kit.so does pypes performance.the summit kits are made by heart throb.they are decent for the price.the tubing is thick and all mandrel bent.ive never put one on a mopar though,just on my a friends mustang and my 4x4.the mufflers sound like crap ,if you buy a summit kit,get it without mufflers.the nicest kit ive seen is the tti.its also one of the most expensive,but you get what you pay for in this case.