I used Suntek CXP (been happy with them for 20+ years - value for the money and my local installer is amazing - it's not the high end heat resistance nor high end crazy expensive material) - I did 45 on the front sides, 35 on the rear sides, rear window, and roof, and 55 on the windshield. I was shooting for uniformity on the sides/roof and not too dark on the windshield.
45 on the front sides is about right. A little dark when taking corners in the neighborhood so I proceed cautiously but otherwise amazing.
35 on the rear sides, rear window, roof, seem to match pretty well...but I wish I had gone 45 - just for the effect of the roof and to keep the rear from feeling so dark. It's still fine, has the heat resistance I wanted, and I'm happy with it, and matches - and works if you're looking for uniformity (which is what I wanted and now I wish it was a little bit non-uniform).
55 on the windshield. This was the subject of much debate because this was the first time tinting my windshield. I'm very happy with 55. It has eliminated the crazy amount of heat I was feeling in the Y (the windshield is huge and I was often feeling the direct sunlight) and it doesn't feel dark to me, even at night. I don't see any issues when wearing polarized Ray Ban sunglasses and my valentine 1 gen 2 is picking up Boggies like nobody's business through it - both front/55 and rear/35.
