How do you find speed squats chewy? I find they are better to use to warm up as opposed to cardio (bike, running).
They definitely get the heart going, I use them for recovery and maintaining flexibility (obviously for squatting but also it gives me a purpose to stretch on days off where I'd usually just be sitting about stiffening up). It keeps these sessions short and effective.
I would use these maybe at the start of a cardio session or something but I wouldn't use them for warming up before doing some higher intensity squatting as I'd be too tired haha. Although the weight is low on speed squats (typically 50-70%) it still is a lot of volume and short rest time.
Definitely enjoying them. Take too much rest on the heavy days between sets and the sessions go on forever, so it's good to change it up every other day.
Squatting more is always advantegous.
EDIT; on a side note I never use stuff like cardio machines for warming up. Every session (no matter what it is) I always warm up my shoulders with a purple mini band doing dislocations, pull aparts, a rotator cuff movement and behind the head pulldowns. On the main days mon/wed/fri I'll do this warmup (http://www.defrancostraining.com/ask_joe/archives/ask_joe_08-10-03.html#question04
with squat to stands in place of groiners). On the speed days I'll just pick any of these at random really just to get myself ready for the upcoming exercise. Depends what areas are needing stretched/warmed up the most.
Then I just take the bar and a few warmups leading upto work set.