I have a much smaller and lighter duty stand and boom arm and boom arm holder, but I have only used it two or three times, preferring instead my familiarity with the Manfrotto heavy duty boom stand, which is what it used to be marketed as. I believe today they called the base the 085, and the boom arm and boom Holder are sold individually or as part of a full set.
for me the stout nature of this boom arm is what really makes it worth the money, and the fact that it uses a heavy duty 15.5 pound counter-weight is indicative of the type of loads that it can support without causing the stand to become tippy. You can of course add sandbags or other weight to the stand, but this thing is not very prone to tipping even with a fairly heavy flash head and modifier attached.as was mentioned above place one of the stand legs underneath the boom arm.
I am myself pretty fond of roller base stands, since I think that actually moving the light and previewing The lighting effect is part of studio photography. Actually moving and actually looking at what the light does is easier with a roller base stand. With a conventional stand there is a great temptation to just set up the light and go… With a roller base stand you tend to move the stand through an arc, And I feel that it is really worth the extra time to move the light to check out possible positionings instead of just plopping the light down,and going forward without having checked out different potential light positions. Sometimes just a few degrees of movement one way or the other makes a huge difference in the results achieved. For several years I used the boom base and one boom arm section as the main stand for my main light,which for several years was a 3 x 4' Chimera soft box. Later, I worked at a studio where we used roller base stands for our main light and our fill light. I cannot emphasize enough that _actually moving_ the lights and previewing and the effect is extremely important.