Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cytomax Sport Energy Drink

I use this drink for mountain biking. I like to ride quite long and usually climb a lot of vertical. These rides can be draining and with the Cytomax I notice a huge difference, not only in endurance, but ease of the work and also recovery. I've tried other drinks and this is the one that is the best. I once used their low glycemic index version which was even better but have not run across it in a long time. This one is great, though.I have also used Cytomax when I have to do hard work outside in the heat, it really helps my resistance to the high temperatures.