I view products like these as a means of maintaining what hair I have, not a means of growing a thick head of hair. You'll never have the hair you had years ago, deal with it, anyone telling you otherwise is lying OR trying to con you with clever marketing. You might be able to slow hair loss down, but if its determined on falling out, it more than likely will.
Anyway, back to the product! My regime involves minoxidil (kirkland) twice a day and usually a good anti dandruff shampoo also daily. I now use this, the shampoo smells good and after lathering a 2 minute wait and rinse my scalp feels clean and lightly refreshed. This shampoo with leave your hair squeaky clean, resulting in what feels and looks like thicker hair (which is actually dry coarse hair as this product has no conditioner). At around £[] for three bottles it is the cheapest I've found, this product is typically £4-6 in shops.
Only time will tell if this product works, however I have had some promising results with minoxidil and I am hopeful this shampoo will help maintain any new growth, if not, at the very least I'll have fantastic smelling hair at least...
Happy hair!