What to choose Content Type or Drupal Commerce or Ubercart I'm working on a project where we've people managing product in site (including product creation, editing, viewing, reviewing, etc.). These are not going to be techie people so the product management should be easy to use with quick loading. The site as of now doesn't allow users to sell and buy product online (It might allow in future, but not confirmed - very less chances). Its just viewing, reviewing, rating products. Also there will be variety of product. We're also planning on creating Mobile App for this so user can manage products from App.

As I've already worked with all of these 3 earlier, my personal thought is that Drupal Commerce and Ubercart may add an extra overhead of e-commerce functionality on our site. I need suggestion on how should we proceed here, what things should we consider while selecting any one of these 3. What should be best choice to go ahead in such scenario i.e. Plain content type or Drupal Commerce or Ubercart.
Just go (start with) what you call "Plain content types".

For the "rating" requirements, have a look at my answer to "What are recommended modules or processes which support rating based comments or reviews?".

Should you ever want to expand that to a (rather basic) e-shop and/or add a shopping cart, you can always use the modules as I suggested in my answer to "How to create a simple shopping cart without Drupal Commerce or Ubercart?".

Next question?