These decals actually work very well with some proper technique.
Here's what I do...
First, trim each decal very carefully right up to the edge of the color. Any clear areas you leave can be prone to a fingerprint showing through from the adhesive side once installed.
Put them on "wet" using a spray bottle loaded with water and 2-3 drops of dish soap. Spray the area liberally where the decal is to be located on the model as well as the back (adhesive) side of the decal once you've peeled it from the backing. Be generous with the spray bottle during this phase. Position and place the decal where desired and then, from the center, squeegee any bubbles and water out to the edges. I just use a small rubber squeegee (about 4" long leftover from an old auto window tint kit) and it works great.
Let them dry for a day or two and then start with spraying a few light "dry" coats of dope over just the decals to get them sealed. After you've got them sealed well continue with the rest of your normal finishing process.