stands out among the bigger online and mail order shops based on knowledge and quality of work. I trust their opinions & factual input more than any other online shop. They ship promptly. Their mounting work has been spot on in my experience - including a bunch of pretty specific instructions and challenging bending assignments.
The only downside is that they usually don't have the cheapest pricing around. OTOH, read about the number of blown mount jobs in the world and imagine sorting those out long distance with a recalcitrant vendor. The one time I had a product issue (the new Leki trigger system) untracked sorted it out for me with Leki and got old style triggers mounted up for me on all the poles in question. And I'm confident that I'd get a fair resolution to any other issue that might surface in the future (and no matter how good a shop is, you never know what might pop up with gear). I'm happy to pay a fair premium for genuine added value - & I've often gotten that from these guys... On the flip side, if all you are looking for is a set of super-discounted sticks, untracked is likely not your place (although it never hurts to look).
I'd trust them to ship anywhere they claim to ship stuff to, but I suspect like the other legit dealers around & mentioned above, they face some limitations on international shipping.