It is very easy to use because of its simplicity compared with other marketplaces such as eBay or Amazon that are not so simple but also have more features than this one (eBay has auctions). I like how it's open sourced software - anyone can contribute improvements! The only thing i dislike about OB1 was when they were working in an office space which didn't allow them much flexibility regarding their work hours/schedule. They had some problems keeping up wth deadlines due to lack of proper workspace setup. With being able to run your own server you will be independent from any 3rd party service provider since all transactions happen directly between users via P2P network without middle man involvement at anytime.