[Burrcold]

Depends what the expectations of the installer were. Did you ask for edges to be wrapped? If so, check the edges and corners to see that they were not cut short and that enough overhang was left so that edges don't peel up. Also any stretch marks where the film may have been over-stretched to cover over an edge. It may not be evident right away, but over-stretched ppf will give you odd reflections and orange peel'ish look in certain light.

Look for bubbles and keep an eye on them. Water bubbles are pretty normal and will evaporate, but if there is any air in them, it will not go away. The installer would have to use a syringe to pop it and pull the air out...heat up and press it down. No big deal. On that same topic, look for any contaminates that may have found their way under the film. Those will show up as a small air pocket that you can't get out.

Look for any damage! A razor is used in many areas to cut the film and get as close to the paint as possible...always a possibility for error and a nice gouge in your paint (uncommon but does happen).

Finally, just wait. You won't be able to find everything when you pick it up and the film needs time to dry. Your shop will likely tell you to come back in 2-3 weeks and have a follow-up to see how everything is sitting, and address any bubbles or imperfections you have found. I generally use some green painters tape and stick little pieces wherever you find areas of concern. Oh and take pictures! Documentation of any issues is key.