Debbie- the thin line across the hood may have been residual adhesive from the plastic wrap on the car in shipping. Mine had a line that looked similar to a film application, but turned out they just didn't do a good enough job cleaning the car after they stripped the plastic off. Not overly pleased.
I got A LOT of chips and dings pretty quickly. So much so that I bought an XPEL Ultimate partial front treatment. I have a ceramic metallic GT, and the dark plastic/metal underneath that paint really jumps out when it's damaged (especially the black plastic). I paid the most well-regarded boutique shop to put it on, because I inspected an example from the dealer and they had sloppy edges and even a tiny overlap in one part. I know it's not easy, but for $800 I expected better. Plus the dealerships use the Digicut system. It's not the worst, but it's designed to help the dealership track usage and waste, not necessarily give you the best pattern or best film. They probably use the 3M film in the machine, which is pretty good stuff, but you should ask. The system is kind of like a CNC machine that just cuts the car's pattern from the roll of film, but some films are better regarded than others.
I paid about $900 for the supercar-stocked shop to do mine, but they use the well-regarded XPEL Ultimate (which has a good, sensible pattern to it) and their lines and edges were as fine as I could imagine any human hand laying them. Inspect some example work from any place you're considering. Get up close, down near the ground (all the tough spots), and use a flashlight. Check for things like parallel edges with uncovered portions, properly wrapped overhangs, and no overlaps. They covered 18" up hood, door cups, mirrors, lower bumper, partial fenders, emblem, headlights (basically most non-chrome forward surfaces), and lines on the edge of all four doors. It all looks very good, and from a few feet away I can't really see the line on the hood. Just like the paint, you have to take care of the film and be careful when doing things like applying wax near the edge, but if you're the type who knows how to protect and maintain paint the film should be no issue. I want to keep this car a long time, so thought the investment in not having little black freckles I could only touch up paint over (which isn't a great look on the light-dynamic ceramic) a sensible idea.
One more thing- the dealership may try to upsell you on the idea they'll warranty the film X amount of years or replace it if you're ever in an accident, like this is something special only they offer. A reputable shop should already stand behind their work, and the good films have their own manufacturer warranties, especially when applied by authorized shops. You add to the value of your car when you purchase this, so just keep your receipt. Have the shop print multiple copies and keep one somewhere safe. YMMV with your own insurance company, but my shop told me to just keep the records or call them for a copy of the receipt if the car is an accident. I have the right to choose where I get repairs done and film replaced so long as it's not over my amount of coverage.