Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not attempt alone.

I ordered this for my girlfriend whom lives across the nation. We thought it would be a great and sexy idea. It was more frustrating than anything. The product itself is a great concept, the way it works is not. The biggest flaw is that the gel hardens WAY to fast. You have about 2 minutes from the time you mix the gel compound with warm water, then it hardens. In those two minutes you must: mix the gel for 60 seconds, pour the gel into the tube, scrap all you can into the tube, get an erection again, then stick it into the tube. Even with a penis ring I still could not get an erection fast enough. The creators need to consider a slower-hardening gel. This product is near impossible to use alone. I would not suggest this product if your partner isn't there to take care of the mixing.