As you can tell from the above posts, there are many factors and opinions about meters. It can depend on where your dishes are located (roof, ground, distance from house, etc.) and whether you can take a TV out to the dish to do the pointing with your receiver.
One other consideration is the receiver you have. For example, I would never use my AZBox to do anything other than peak a signal (usually for S-2 signals) on a satellite I already have locked on. The meter is a thin line and the quality numbers are too small, especially on the 13 inch TV I use out at the dishes. Even when peaking for S-2 signals, I constantly have to go up and down the ladder to check the numbers for that extra point or two, or take the TV up to the roof (for some of the dishes I can't reach by ladder).
One time when just adding an extra LNB to a dish I tried to use the AZBox, and eventually gave up as it wasn't locking on a signal and when I did a blind scan it didn't find anything or even give a hint that I was close (and it takes a long time to blind scan). I eventually used my Pansat, which has a nice big meter with readable numbers, even when I am on the roof and the TV is on the ground! As well, when you do a blind scan, if you are close to getting a signal, but not quite strong enough to get it, it will hesitate in the scan, showing you that you are close. Found the satellite in minutes with the Pansat (and I wasn't that far off it in the first place, but with the AZBox I could have been up there for a long time trying to find it).