Electronic Injection kit

[baddi]

Hey guys, look what i've found!
A kit to modify a carburator engine into a fuel injected engine!:
http://www.mbe-motorsports.com/catalog/product_info.php/products_id/190%7B30%7D103%7B36%7D125%7B35%7D167%7B52%7D180%7B31%7D104%7B29%7D101%7B32%7D107%7B42%7D127

Have anyone got any experience or does anyone know anyone who has experience with such a kit or anything like it?

So far i have found on the internet that this kit functions very well on 125-200cc engines (and a few have tried it on 90cc), but i've heard nothing about 50cc engines, so unless someone tells me something bad, or sais that there are close to none gain in fuel economics and effect, i will save money and buy it when i can afford it