I've only had mine installed for a little over a week, but the adjustables will feel extremely different depending on what setting you have them on. On the stiffest setting I feel like I am on rails but every little bump is felt. On the softest setting, it felt a lot like a Crown Vic and I hated making any turns. I ended up sticking it right in the middle for right now and am extremely pleased so far.
I'd imagine that you'd never change the settings once you set them where you wanted them, so the "adjustable" aspect wouldn't come into play very often. They're great when you're setting up the car, and lots of fun to figure out how you want them set, but once it's where you want it.... why change it? If you go with the non-adjustable ones I'm sure you'll be pleased with the results, being as anything will be better than your worn out stock pieces, but if you're picky about your ride quality you may want to go with the adjustables.
I would have probally gotten the non-adjustable ones if I haden't found such a good deal on the adjustables... they were
FREE!
