Pros
In theory the pro is that you can do your work whenever you want. However this is true to a point. In the 40 days or so I worked for the company I noticed that often there were no tasks available for me to do. Basically the availability of work (the so called "tasks") is very unpredictable.
Cons
After about a month working on "tasks" I started feeling kind of humiliated as a result of the nature of the task. Altough the test and admittedly some of the task might seem initially interesting the true is that the large majority of tasks are very repetitive. Also altough the Company tells you that you will be paid for the time you spend on the task the reality is that you are paid only if such time is within their "expected productivity goals" or whatever the call them. 10.50 (gross) euros per hour might not seem bad initially but considering that the tasks take on average longer to complete and all the administrative tasks you end up working for 2 hours to get paid for one. In the end they did whatever the could to avoid paying the work I had done and they succeded but I was glad anyway to leave. Not sure to whom this work can appeal, perhaps to those devoted to slavery.