1. Open space - sometimes it's difficult to concentrate on your current tasks since there are lots of people nearby who are on their daily standups. 2. Probability of ending up in a "swamp" - you may stagnate in a long-term project with no perspectives there and gradually lose your qualification with only little chance to leave the project. 3. Working hours - highly depends on the project, but generally an ordinary workday is shifted into the second half of the day 4. Weak horizontal mobility - it's unlikely to change your main technology/area of work 5. Salary growth mechanism - non-transparent for both newbies and some oldbies due to the lack of average values in the local area