What Are the Pros and Cons of Vivaneers?

All methods of "no prep" or "minimal prep" veneers have risks involved. If porcelain is thin, fracture incidence is more common. In an effort to NOT prep teeth, the results are often too big or bulky. Depending on where the starting point is, prepping teeth may not be avoidable to get the desired result.
No prep veneers are still permanent and pain levels are still about the same as prep veneers. If a person wants no prep veneers removed they must be cut off and the removal damages the enamel, which is irreversible. Reports of pain from traditional veneers is normally due to the inexperience of the clinician and not due to the material. I routinely have patients report no discomfort (of any sort) during the entire process.
No prep veneers are marketed to unskilled or untrained dentists as an easy way to improve a smile. However, cosmetic training is still needed to avoid the letdown associated with results that don't meet up as intended. Skilled dentists can and do offer this service, so homework on the dentist providing the service should still be done.
20% of my smile makeovers are simply redoing no prep veneers.

Vivaneers and other similar no-prep options, have been trending for some time now, but for only a very few patients do I recommend the no-prep option. Either their existing teeth are small to begin with, or they insist on it and can't be swayed.Although the no-prep veneers (of which Vivaneer is 1 brand) is super-thin, that little extra something on top of most existing teeth usually creates a bulky unnatural look. Again, the choice is up to the patient, but if a beautiful natural smile is the ultimate goal, then traditional porcelain veneers are the way to go.Hope that helps.James Asaf, DDS

Vivaneers are a type of no-prep minimal prep veneer made by a lab called Glidewell. (this product is similar to Lumineers which happens to be more heavily marketing to the general public)

No-prep veneers can be a good choice for some patients who do not want to cause permanent damage to their teeth.

For some patients if the teeth are not prepared the veneers/Vivaneers even though they are very thin, can still make the teeth look bulky.

No prep veneers work great for patients with small teeth and multiple spaces.

Pros of Vivaneers (or any minimal-to-no-prep porcelain veneer) over traditional veneers are that the teeth are minimally prepared, if at all, may be considered "reversible", and have a better bond than traditional veneers that are more heavily prepared. However, the most important part of any cosmetic procedure is picking the right dentist and lab. Make sure the dentist has had a lot of experience with both prep and no-prep veneers and that the lab she works with has designed many of these as well.  The brand name is less important than the craftsmen (dentist, lab technician) doing the work.

The veneer that is best for you will be determined by your dentist, not you. Sorry to sound blunt but no-prep veneers work for a very few people. The teeth end up bulky and not natural looking.
A good dentist knows how to alter the teeth in preparation for porcelain veneers and patients should trust them to do so. The no prep veneers can also make your lips look like Melanie Griffith. Google her and see if you like her photos. And no, I didn't work on her...yet!