Do you think unions are a good thing?

When a company is forced to hire 3 people to do the job of one person then unions should be gone and anyone that has ever been in a union has seen this before...I have been a member of 3 unions in my lifetime and they were all the same. When I joined the machinists unions I was told to slow down because the company would expect everyone to do as much as I was doing. My brother is a union member and he brags about working 4 hours a day and playing cards the other 4 hours of the day. They say on average it will take 2 to 5 years to fire a worthless teacher because of the teachers union and in Obama's stimulus he is requiring union employees be used for any project funded by the stimulus so we will be getting 1/2 of the value from our tax dollars.