I know that this post is quite old, but I still thought I would add my two cents

I've always wondered about the berries too as I've heard good stuff about them. I went to Holland and Barretts and they were on offer, but then I found out that the capsules weren't vegetarian (sucks to be me

), but the guy there did recommend the juice to me so I tried it out. I didn't notice much of a difference to be honest, but I did have to stop for a week as I went on holiday and I wasn't going to walk around with a bottle of juice

I'll see what happens when I resume taking it.
If anyone still is interested I saw that Groupon has a deal on the berries today
http://www.groupon.co.uk/deals/sheffield/power-acai/924475