I fitted the Synscan goto arrangement on my EQ5 about 3 months ago. I like it, and they are quite tolerant of a degree or two of polar misalignment. Having said that, the closer you can get it the better. If you intend going into deep sky photograpy more tweaking of the alignment is required.
For observing from a light polluted backyard they are great.
I use a "Quick and Nasty" guide to do mine, works a treat and not complicated, all explained on one A4 page. I've found some of the other guides overly complex.
It does assume you have leveled the mount and done a rough altitude and azimuth setup with the scale on the mount and a compass. Just make sure you have allowed for the difference between the S magnetic pole and true S. This will vary with your location, about 11 degrees to the East for here. I didn't at first and it caused a lot of head scratching until a couple of friends set me right.
Cheers
Bill