Standard offering at our rink. It works, if the instructor knows what s/he is doing; can adapt to varying ages; and is most effective if the instructor knows the specific demands of figure skating.
During summer intensity ramps up, and we usually see the benefits at about week 2; but, that's because it's part of the entire periodization leading up to the competitive season, and everything is building at that point. Post competitive season it ramps down as part of the planned training cycle.
The "gap"between sessions in your program is different from our program ... we do it more regularly, and sessions target different areas in a planned sequence ... it's daily for at least and hour ... but they don't do, say, upper body every day, it's all planned and executed. The kids are also grouped in our program in terms of "skating and athletic maturity level" so that younger kids/less athletic kids aren't struggling to keep up with kids further along the continuum.
Some kids really like it, some don't; a lot depends on the instructor ... and whether the kid likes this sort of stuff and/or sees the benefit.