With all-natural ingredients, and no added colour or flavour, Maurten Drink Mix 320 is easy to drink. It does taste sweet, which is understandable, and has a thicker consistency to normal sports drinks; somewhere between a drink and a gel. However, the taste and consistency are massively more preferable to sickly gels or solid food, especially late in a long ultra.
I tested Maurten in tough event conditions, the Country-to-Capital Ultra and it was first-rate. I definitely felt the difference and around 10-15 minutes I felt I had the energy I started with and my legs rejuvenated. I did suffer GI distress post race but then I do with every energy powder and is consistent with running close to lactate threshold for 30+ miles. I wouldn't attribute it to the Maurten.
Each sachet when mixed with water makes up a 500ml bottle, and delivers an impressive 80g of carbs. To give a rough comparison, some leading brand energy gels contain 45 - 50g carbs. In a race vest where weight to carbs ratio is vital, Maurten is a step above the competition. The packets are easier to open than rivals like Tailwind or GU Roctane, and can be simply emptied into a soft flask, provided the opening is wide enough.