Convertible car seat

Best convertible car seat? Easiest to install, easiest to loosen straps and tighten, and safest! I got a safety 1st car seat and hate it. Took forever to install (took 3 people to finally get it somewhat strapped in and I still feel like it isn't safe) and my LO is so uncomfortable in it and cries while he is it. I'm willing to spend whatever to keep my little one comfy and safe 🙂