My experience with the RCBS Chargemaster 1500 has been very positive. Using a fine-grain powder (H335) or a relatively small-grain extruded powder (Benchmark), all of the automatically-dropped charges have been right on the money. I am using between 24.0 and 26.0 grains for my loads. I haven't measured the time between charges - it is fast enough that it doesn't matter. I never wait on the Chargemaster - it waits on me.
"Static cling" of the powder to the inside of the powder reservoir and to my aluminum funnel was a problem until I started using anti-static dryer sheets. This cleared up the powder cling problem right away. Note that this static cling is not unique to the Chargemaster - it exists with other powder measures, scales and funnels, especially with very fine-grained powders.
Regarding the scale portion of the Chargemaster - in a word, it's great! I didn't realize how bad my previous small battery-powered electronic scale was until I started using the RCBS scale attached to the Chargemaster. My old scale needed re-calibration after 5 to 10 loads. The new Chargemaster scale just keeps on going. When I first started using it, I would check with one of the provided 50 gm weights and with a 10 gm weight every 10 or 20 loads. The measurements were consistently accurate without re-calibrating. Now that I trust the scale, I check only after every 50 rounds or so. Even that is probably overkill.
I bought mine on sale at Natchez about 2 months ago for about $250.
If you get a Chargemaster you won't regret it.