Shopping List - which one and why ?

I have seen that there are shopping lists available for the Android Phones, but I am confused by the amount of choice....There are so many of them, which one do you prefer and why ?

I would like to find the following features:
- free app
- able to enter the list on the PC and then download / synch to the phone (virtual keyboards are a bit of a pain)*
- ability to enter/track prices

some things that would be nice but aren't essential:
-unit converter (some stuff here is sold in metric, some in imperial measurements and working out toilet paper is a whole science by itself)
-UK based (chips are chips, crisps are crisps... :-))
-price comparison
-barcode scanner

* I don't mind if this is online or local to my PC, as long as I can use my PC keyboard to make the list

Dr Shopper seems to have most of this ? https://www.nextpit.com/en/android/market/apps/app/com.zetriva.drshopper/DrShopper

thanks