Match features with products

[eluser]Lykos22[/eluser]
Thanks for the reply, in fact I was already started doing that!
Two question though:

1. [quote author="Stefan Hueg" date="1375148284"]As a sidenote: You dont need an ID for your Features_to_Products as it is just an extended pivot-table [/quote]
The id to Features_to_Products table was just to have something in primary key, not really necessary in my code. Isn't a table required to have a pk??

2. I tried to study the database model of some cms shops like open-cart, prestashop etc but their model seems too complicated and although very useful tends to be slow. This solution seemed to me more correct instead of having all features together, as i mentioned before, or something else, but is it the best? I mean how should a more experienced developer would handle that matching features with products??