So I did my first jump in 1999 at the DZ shown alongside Spaceland. I did 7 jumps there and quit because I ran out of money and took up the sport a couple years ago. So I got to start learning again at a different DZ which was much more modern. Both time were very different experiences.
For the 99 experience, since it was so small, I essentially hours of 1 on 1 training with the DZO, who had been jumping for 30 years. Most times, I was the only person there, and I got lots of practice and very thorough debriefs on ways for improvement. That being said, even as someone new to the sport, I was scared shitless of his gear and definitely his 182s. I was also highly aware of the gigantic power lines running down the side of the landing area. But, I jumped there anyway and everything worked out fine.
Now move on to my AFF experience where my AFF instructor would come off a tandem, spend about 5 minutes worth of dirt diving, we go do the jump, and I get about 2 to 3 minutes of debrief before he has to go do another tandem. DZ was really nice though, gear was good, I just wasn't the number one game in town. Quality of instruction was poorer, but since I was 30 years old when I came back, I tended to approach things with a lot more thought and caution than I did as an 18 year old. Studied the SIM a lot, came on these forums, watched videos, etc.
I guess what I'm trying to say is even if a DZ looks like shit, doesn't mean it's horrible. Just because a DZ looks slick, doesn't mean it's the best.
And finally, you can also learn a lot about a DZ through this website.