I have purchased, assembled and used the double rotating composter (100 Gallon) for about 4 months.  The unit works very well and the compost matures quickly.  I recommend this product very much.  I am giving the product a rating of 4 rather than 5 star only because of the difficult assemble process.  It is difficult to assemble, even with 2 people.  Having said that, the final assembled product works very well.