I've had the RCBS combo for about a year.
I have been very happy with it. It can seem a little slow at time with larger charges, as has been mentioned. What I typically do is charge several cases and then start seating bullets while the unit is throwing a charge. That keeps things from coming to a temporary halt if the unit throws an over-charge or something. I just dump the powder back into the unit and seat another bullet while it throws it. Some powders it will go hundreds with never throwing an over-charge, other powders it happens more frequently.
The one thing I wish they would add is a light that would go on when it's over charged. Watching the display to make sure it shows "stable" and the right charge takes a little extra time, the little ticks on the display that show over or under are pretty small. A light would be nice. I also wish that there was a way to dial back the counter when there is an over-charge and you dump the powder. It would help keep track to make sure you haven't double charged or missed a case. As it is, it just counts the total number of charges thrown, not necessarily the ones you've actually used/charged.
My son and I shoot competitively and I load a few thousand rounds per month. For the really high volume stuff I use a progressive press and just use the scale of the RCBS combo for randomly checking charges from the powder measure. It works great as a scale too. For my hunting rounds in several calibers I prefer to use the RCBS Chargemaster for extremely consistent charges.
I honestly can't imagine being without one now. Compared to a beam or electronic scale and a manual powder trickler it's much more convenient. I haven't tried the Lyman, but based on my experience I wouldn't hesitate to reccomend the green one, or to buy another for myself.
