I really wanted Xpel Ultimate but I couldn't justify the cost of $37,000. I already had the terrible experience of damaging my car 2,000km and three months in but even then, the damage cost $10,800 to fix (and $2,800 of that was for the rim which neither product would protect).
I went with Pomponazzi in the end and I have been happy with it. Never really put it to the test (fingers crossed!) but it gives the paint a real glossy shine that looks fantastic!