Just put my composter together and I'm very pleased! The containers turn well and overall it seems sturdy. Pieces fit together tightly (i.e. don't think critters will be able to access). The instructions included send you to a website with great photos and easy to follow steps. I built it by myself in about an hour. 

ASSEMBLY NOTE for arthritic hands: I am a 30 year old female and found that at times, assembly was doable but challenging. Majority of the tumbler is hard plastic with grooves that fit snuggly together. It requires a good bit of hand strength to get some of the pieces to fit. Result is that it seems sturdy and secure but my mom who has arthritis and carpal tunnel in her hands would have needed help. Nothing prohibitive, just something to be prepared for!