Divine was around for a LONG time and had their fair share of good installs to offset some of the bad stuff. They always had at least one good installer (great actually-he was there for 18 years and built some show winning stuff). There was usually another average installer-then the rest varied. So, the job that came out of there depended on the installer who did it. They had a LARGE customer base.
Pop My Trunk was small and only there for three years. And, I forgot about the "strip club" shop-kinda short lived too. Only the strong have survived and thrived in this economy. And some made enough money and just hung it up-not wanting to fight to make a living anymore.
HH Greg was a joke as far as car audio. Best Buy has crap for installers left and their 12 volt department has shrunk to nothing. And many of the new stores don't even have a 12 volt department. I wouldn't be suprised if they exited the car audio/video segment all together in the next year.
This business is slowly being brought back full circle to the smaller, single-store brick and mortar shops where it all started back in the 80's. Except, customers are smarter. They expect more from the shop. They want it clean, presentable, and with a good reputation. They want good value, and great customer service. You know the guys who are delivering this=still in business, still going strong!