"Like" is a funny word ... I've done conditioning work with sandbags. I've got a duffle-sized bag filled to 95lbs right now, and I have done Turkish get-ups with it, AMRAP style. Conditioning-wise it's done me well, in that it allows me to spike my heart rate to 170+ while moving my whole body. Utility-wise it is pretty "sport specific" since it's the same approximate motion I'd need to do to shoulder up an ammo box from supine foxhole defillade, if I was still a machine-gunner. So in that respect it commits the D1 fallacy, in that it is really practice rather than training ... but for *conditioning* it's great...
...but I wouldn't say I "like" it?
If conditioning is the goal, it seems to me the chief concern is compliance and consistency, though I admit I'm not all the way read-up on why SS likes the prowler so much.