I've used the Gitzo spiked feet from the beginning, always glued in and they still fall out somehow (they come with rubber covers also). In fact just yesterday while getting ready for a couple weeks trip to Iceland I noticed that one of the new spiked feet is now loose - it was glued in with locktite as they all have always been. What I do is tape them tight with electrical tape after glueing and that will hold them on, but it is just a shame I have to do that.
I've got 8-10 different tripods (wood, aluminum, carbon - I'm a tripod hoar!), and actually find this one with the cube head to be very light and easy to carry and the best combo of them all (I've got heads by Markins, RRS, and Gitzo too). I just carry it over my shoulder via padded sling and can carry it and a heavy camera backpack for hours - great system.
I use the Photoclam version of the cube head and love it - once you use either species of the cube-type head (Photoclam or Arca-Swiss) you won't be happy with anything else. Spending that sort of cash on a tripod head was tough to face for a starving artist like myself, but it is easily as valuable as any lens I've ever purchased - other heads seem like toys to me now and are very frustrating to use. (not good for action like sports or wildlife though) I find this cube head to be at least as fast as any ballhead for landscape work, and probably faster, certainly easier to use.
I've taught my students for years that "lightweight" tripods are not very good, and can in fact lower image quality when you think your camera gear will be "sturdy enough" on one of them. It is much better to lose a pound or two of flesh and buy a heavy tripod instead (most of us are overweight to some degree anyway) - not only will your photos generally be better with a heavier, more sturdy tripod, but your health will be better too, ha! (I just lost 20 pounds in advance for my Iceland trip and I'm considered trim to begin with - there was plenty of fat to lose though, and I hope to never gain it back again.)
A good tripod and cube head are an investment like any other piece of camera gear, although should last through many camera systems far into the future so the cost per year is really quite low, even with an expensive setup.
Tim Ernst in Arkansas