Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Proflex Review

This machine is crafted like a tank, took 15 min to assemble with no trial and error what so ever. Some of the best instructions and workmanship I have seen. They even included actual wrenches to do the job. The exercises are great and the machine delivers.The only reason I held back from 5 stars is the following.1. The machine shows to be white in color but I was shipped a dark Grey color.2. The instruction sheet on how to do the exercises is scant, and the very short videos on the website are to much of a pitch for the machine. Now it does not take a rocket scientist to do a stretch, but I think for the price they are charging they should include a video and have more in deph stretching on the website and include guidelines on how often to perform the exercises and what kind of degree gain you should be shooting for.