I've tried oleamide up to 100 mg oral with soy lecithin. It produces a nice little happy buzz. Kind of unique unto itself, but sort of similar to eat a pot brownie, maybe a diet pot brownie.
Smoking seems to produce a more noticeable effect at lower dosages (25-50 mg) which is similar in many ways to a light pot buzz. It is harsh on the lungs tho, and the high sometimes almost feels dirty or too buzzy in the head if smoked too fast. All in all, I found oleamide, as well as several of the similar NAPE isolates, best used in combination with pot or jwh-018 or jwh-073 as it seems to round out the pot buzz nicely, making it seem more complete somehow. More full, erasing the rough edges. Making it feel somehow more content.
Anyhow that's my 2 cents.