There may be a few advantages with tubulars, but the disadvantages far outweigh them. You'll see many racers use them for weight savings and better performance, but they are usually their extra set of wheels and not their primary. Most don't ride on tubulars for recreational rides or even training. The first flat will convince you if the can of leak stop fails. Changing a flat with clinchers on the road is a breeze. The initial mounting/gluing can be a nightmare if not done properly, and it will cost you to have them properly mounted. I'd return for clinchers, bite the bullet and try to read more carefully before the next purchase.