My Protein sent me some of this to try out, and here are my thoughts.
When I read the packaging I couldn't believe the scoop size needed to use this powder. I started looking at the measuring spoons in my kitchen. Then I found the v absolutely tiny scoop inside the packet. "This is going to last for ages" were my first thoughts. To compare, a big scoop larger than an egg cup was needed for the last electrolyte powder I used. It's going to last for AGES.
It's supposed to be flavourless, however I am lucky and have delicious Yorkshire Water coming out of my tap and so I confess I do notice a slight taste. No problem though as I'll just drink it with my daily fruit juice, or with water and don't worry about the taste. In comparison other electrolyte I've tried has had it's own taste anyway so I guess it's personal preference. You might prefer tablets or flavoured powder, but you're not going to beat this for value for money. Some electrolytes are sold in single dose sachets, this pouch will go on for many, many doses.
Does it seem to 'work?' Tough to tell but I'm marathon training at the moment and I've not suffered any signs of dehydrating on my long runs so that's a thumbs up from me.
My Protein gave me some of this product to try. I've already purchased some more of my own. There are various discount offered here if you fancy some: http://www.myprotein.com/voucher-codes.list