I work for a commercial hood manufacturer and was sceptical about the quality of a hood purchased online. Based on previous comments I purchased this hood. The quaity of workmanship was excellent. The corners were welded, ground and polished. The installation was not very difficult, however I modified some of the steps because of the experience I have in hood installation. If you follow the instructions you should not have any problems. Some of the features were not listed. Controls on both sides, grease cup, a section of duct was included, programable off delay. My only complaint so far is that I hade a power outage and had to reprogram the off delay.