I have one of the H series cues with the variable balance point and really like it. The reason I went with this cue was because my old cue was long in the tooth and the finish was wearing off (purchased it in the mid 90's). Last november I decided instead of putting 200 - 30 dollars getting my cue refinished I would put that money towards a new cue. I really wanted to experiment with Low deflection shafts. I tried a few of my friends on my old cue at various points in time. They all felt different and I narrowed it down to the balance points changing. Most LD shafts made the my cue feel really back heavy.
So my intention was to use my new cue to try out a couple different shafts and be able to change the balance point of the cue to match the shaft. I went through a couple shaft until I found one I really liked (and found a few I really didn't like). Since i settled on a shaft I haven't changed the balance point.
I will say at first there were a few minor issues with the weight system. For the first couple of months I had to tighten down the allen screws fairly often (once a week sometimes) or i would get a lot of vibration in the cue. After a couple of months I got tired of having to do that, so I tightened the screws with way more pressure than I was comfortable putting on those small screws. I figured if it breaks, its got a life time warranty. Since I done that, I haven't had a single issue. My next step was going to be to put the smallest amount of blue loctite on it, but thankfully i haven't had to do that.
My only other complaint about the cue is the weight bolts are extremely expensive and not a lot of people carry them. I was going to get a 1oz weight to change my cue from 18.5 to 19oz and the cost was near $40 dollars once you added in shipping costs from Mcdermott. needless to say I didn't order the weight.