It would depend, how many hours at work (assuming you don't like your time at work) you sacrificed in order to get six months. As time is really money in some respects it's simply a calculation based on a series of conditions.
Salary, age, work enjoyment & impact on future work/time commitments. For some people they could gain more than six months back of enjoyable time as a result of it.
Personally I wouldn't, but that's because I don't mind my job.