I bought this simply because I have the usual woman issue of constipation, and decided that getting more fibre into me was definitely more beneficial than relying on laxatives (or not as the case). I agree with all the other reviews, it doesn’t mix well with water at all. I’ve added it to porridge and was fine but I tend not to eat porridge too much as it unbalances my macros. However if been adding a teaspoon to the first couple of coffees in the morning and it’s fine. A bit ‘gritty’ but I pretend it’s gourmet sh*t all Pulp Fiction style and I know I’ll get used to it.  So does it work? 100%. I can’t believe how less bloated I am let alone the fact I now have a daily (if not twice daily) movement. That little lady belly is disappearing and I’m even seeing some definition return despite not having a good week tracking wise.  Best money spent this month. I feel liberated #pootastic!! 
Goes Well With:
Coffee Porridge 

Tried mixing this into a protein shake (I mix my protein with water not milk) and this was an epic failure, it was very grainy and made the shake taste funky so I now resort to taking like someone else suggested, teaspoon straight into mouth, struggle to swallow with some water then repeat. I haven't tried with a smoothie but can see this working maybe? I also put some if I am making a batch of protein bars with nuts,oats, protein powder etc and this goes un noticed.
Goes Well With:
small amount of water and swallow protein bar (homemade)

I was buying MyProtein's fibre product but they recently stopped producing it. So I had to default to this, its a real let down compared to their previous product which was excellent compared to this. It does not mix and sits as a 'sawdust' like powder in your drink, and don't try and have it with water alone, The only way I can get it down is in my protein shake and it still ruins it. Whilst I like the other products MyProtein offer, this is a no go for me.
Goes Well With:
Nothing