Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not for advanced

I bought this product thinking it would deliver the results they are saying but nope!! I consider myself an intermediate, advanced and it is not what I expected. They are too short in my opinion plus their 8 second MINI bursts are not enough to get my heart rate up, not even half way., I w/o 6 days a week for around one hour or more and obviously had to stack 3 or 4 in order to get a good sweat. So if you're an advanced, there's no way you'll be satisfied with this pack. Would NOT recommend.