I have been tubeless for 3 or 4 years. First on a set of stock wheels on a low end tarmac, then a set of neuvations, then a set of stan's alpha's, now on to fulcrum racing 3 2 way fit (two sets, one on each bike). The fulcrums are by FAR the best I have used, you don't typically need sealant or a compressor to air them up, although it is recommended to make sure the tire is bedded 100%. In this time I have had two flats the sealant couldn't handle (big chunks of glass) and a two other flats that were my fault... remember to change/add sealant every 6-8 months! If you forget, the sealant either leaks out as it seals punctures, or dries up.
I haven't carried tubes or a pump in years, and I LOVE it. I have had to make the call of shame a couple of times, but I am ok with that for the rolling resistance, comfort, and flat protection a properly set up tubeless wheelset offer.