I've been using Nanogaine/Nanoguard products since April this year and and can honestly say that, in my case it definitely works. I can't really comment on other hair loss products as I haven't really used them (except for Regaine, which worked, to a degree) but I'd say that Nanogaine is comparable with some of the other top hair loss products on the market, although it is rather expensive.
I only started using Nanogaine because the online pharamacy I ordered my Regaine from were out of stock and recommended two or three alternative hair loss products. I couldn't find any views on any forum from anyone who'd used their products and didn't fancy paying more money for a product that I'd never heard of over an established hairloss product like Regaine.
I decided to give it a try a couple of months later and so far so good.