Yes they are well worth it. I had one on my bow this year and it was awesome. I carried my bow on my pack for a week with the quiver facing out and dragging it though some nasty stuff and never had a single problem.
I also have the tight spot, it is a very well built quiver. There is no vibration or noise if you properly adjust the rubber dampner against your riser. Well worth the money in my opinion.
I picked one up tonight at cabelas. It is marked strother brand but exactly the same and save 10$. Inside the package, it says tight spot. I just installed it on my bow and can't wait for the sun to rise to fling some arrows.