Just have a look on Youtube loads of videos showing the boosters set up they sure do increase range but you are better to replace the antennas as well and it can end up costly.
Thanks for all the replies, xzgraham I am looking to spend around 100 for a quality signal booster & anttenas. I was looking at the one I found on Amazon.
The windsurfer is nice for giving your signal direction where you want it to go. I am looking to also boost the signal to help penetrate around objects/go further.