The water soluable stuff that I use would pull off like the press and seal, it is light weight (though I use other weights for different things like lace) and then when it is washed it washes out of the stitching, it is a starch base and scraps can be used as starch for fabric and such. I find it easier (just did a bunch of towels etc) when doing lettering or where there is small spaces that don't get embroidered, I don't need to pull, Just wet or wash and out it comes.
I don't pay a lot for the light weight stuff, the heavier stuff is more expensive but can also be patched together with a little water. I use as many of the scraps as I can either on smaller projects or put them together to cover the area that I am embroidering, I hoop the big pieces, if I am putting them together, I just dampen down the corners and it sticks to the towel and doesn't need to be in the hoop.