I'll never forget the first day we brought my daughter home and we could not figure out how to put my daughter in it. There were so many straps and buckles. My husband ended up putting her in all funky and I knew it was wrong, but rather than fight, I worried about her the whole way home. That was our lesson in child safety seats. It's great to have these reminders. The rules change so frequently. Who knows when my now 7 year old will ever be out of the booster seat!
Wanted to add that many cars don't accommodate the LATCH in the center seat. Made that mistake when I installed Jillian's and am so glad I had it inspected before she was born. If you only have 4 LATCH points in your vehicle then those are for each window seat, there will be a 3rd set in the middle if it can be used there.