Like atomic said older films like 3m might turn yellow because of adhesive but based on my research and after talking to xpel representative, Xpel shouldnt have the problem. Xpel ultimate also comes with 10 years warranty. You can get Xpel installed without getting seams, just get the full coverage.
I don't like seams as well but I was ok with getting door edges for protection. The installer recommended partial hood but I went with the full hood because I didnt want to see the seam.