As stated above the bushings lower your BB and slacken the head angle. If you are into that kind of setup it will make your bike feel amazing through corners and on really steep stuff. On your 5 you could run up to 2 bushings and as such you could really alter your setup. For me offset bushings turn the modern do it all full susser into the bike they should be rather than what the manufacturers give us.
I used a Burgtec bushing for a while which was very well made and titanium but seemed to eat shock bushings and made a horrible creaking noise. I changed it for a TF Tuned made one (I can only use 1 on my type of pivot) and the noises have gone away as have the poor bushing life.
A brilliant way to change a bike out of all recognition for £50ish