If V Beam is more recommended over IPL for rosacea among doctors, why is the user rating so low on V Beam?

Pulsed dye laser (such as Vbeam or Vbeam Perfecta) can make a huge difference in rosacea, visible blood vessels (such as telangiectasias), and pink or red birthmarks. This widely-used laser is safe and effective when done appropriately, but the results can vary incredibly depending on the settings used and the expertise of whoever is firing the laser! If you want results, choose an MD who's experienced with this laser who can tailor the treatment to you, watch for the right endpoints and make adjustments as she goes, and help ensure that the settings are safe but powerful enough to get results. 
Most patients with rosacea need at least 3 treatments to get the results we are all looking for - the improvement can be dramatic. But rosacea does tend to creep back with time, which is why many of my patients choose to do touch-ups with PDL periodically (every several months, or at least every few years) to keep redness at bay.
I also love IPL for fair skin types, but I don't consider it as effective for rosacea. It's a nice combo-platter option for those who have lots of sun spots and mottled pigment addition to facial redness.