I would not go so far as to call other products necessarily fakes, but it is a bit misleading in most instances when what is mostly ionic silver is referred to as colloidal silver. Having researched colloidal and ionic silver fairly extensively and having a good friend whose company makes one of the two best true colloidal silver products in the world as far as I know, I do prefer solutions that are predominantly colloidal silver, but that is not to say that there are not good mostly ionic silver products out there or that you cannot make your own mostly ionic silver at home that will get the job done most of the time,
The site you refer to is that of the company which makes Mesosilver, a true colloidal silver which is one of the two best to be found. The other product which I consider in the top two is Advanced Colloidal Silver, which is made by my friends' company Utopia Silver Supplements, They also happen to be a CureZone sponsor.
I don't think you can go wrong with either company's product. If you want to save some money. make your own mostly ionic silver at home with a good quality machine and that should be fine for most uses and get yourself some of the top quality commercial products in case you need it for something really tough.