I bought this at same time I bought a new Weber grill to replace an older one.  I'd never used a smoker and was excited to try it out.  Assembly time was about 20 minutes and Weber includes sufficient information to get you started, though there's tons of guidance on using a smoker on the internet.  I bought the 18" model because I felt the 14" is too small for foods I want to smoke, and the 22" is larger than I want to store.  I couldn't be happier with my purchase.