I give 4 stars because the product works well, but I specifically requested the version with N4200 CPU from the seller, I even asked before I bought if it's possible. I received the worse version with N3350. Don't expect the seller to honor your request.
Brilliant product worked seamlessly fitted perfectly. Very quick delivery 7 days. Very happy.
Brilliant service and product. Very happy with it. Its transformed my Lenovo and given it another 5 years of life. A++