The reviewers who don't like this place are generally those who don't understand what a Pierre et Vacance style of residence is all about. Once you understand what to expect, you'll see that this place is great, especially for the price.
Read all the information -- it states clearly when the front desk is open and when you can check in. Time your arrival accordingly.
Also know that there is not daily housekeeping. You are basically renting a little apartment -- so cleaning it is up to you. Yes, that means you have to take out your own trash and buy your own toilet paper (after the first roll). And you'll have to make your own bed.
But the advantages are many! Having a kitchenette is wonderful, as there are just so many great little shops and markets to buy fresh food to make simple meals. A supermarket is about 2 minutes away, with other options in the area. And don't miss the daily Marche--the fresh market close to the sea. You won't go hungry in Menton!
You're also about 5 minutes from the beach.
If you want a lavish room to Instagram and brag about all over social media, this won't be your first choice. But if you want a fine, clean, simple place where you can cook and live like a local, this can't be beat for the price! It's a great value.
Enjoy!