I am a recreational rider and use King cages on my Independent Fabrication Ti Crown Jewel road bike. The old-school design and titanium finish of the cages compliment my frame set very well. The cages are extremely light, hold bottles securely and do not scuff the bottles. The only weakness might be cost, but in my view the price of the cages was consistent with comparable products.
The product is 'as advertised'. Lightweight, strong, and does not mark bottles. I bought two cages for use on a Litespeed Xicon Road Bike and have been using the insulated 24oz Polar Water bottles in the cages. The cages hold the bottles in place quite well and I am fully satisifed with the purchase.
These cages are not cheap but are well made, Made in the USA, light, and look great on a Ti bicycle. While the welding is good there is a difference in the visual quality of the welds on the cages vs. the welds on the Litespeed frame. However, once mounted, the welds are not seen anyway.
This cage will last forever. At 28 g., it is light as well as great looking. Mountain or road, you will never lose another bottle.
This cage holds the bottle much more tightly than Ron's stainless steel version. I wouldn't quite say that it's too tight, but your bottle is guaranteed not to bounce out, even on the roughest descent.