Review of javascript react.js code

General information for the website: Online service provider
Description of requirements/features: We have had a project developed in react.js and now we would like a review of the code including the following:

* Overall quality of code
* This needs to be a quick overview, rather than detailed improvements or suggestions
* Number of hours needed to develop in your estimation
* How long do you believe a project with this amount of code would take to develop in days(8 hours per day)
* Breakdown of which sections are handwritten vs framework/library based
* For example how much is hand written code

We would like the review to take around a day or so to complete and access will be given to the bitbucket repository to view, download and review.

You should have the following skills:

* Web development
* Javascript
* react.js
* node.js

You should be experienced in web development and javascript. You could be considered an expert in this area, with experience of freelancing and web development. You should be familiar with all the above technologies.
Extra notes: