I have owned one Vizio and had a more recent in my home. A recent review of six soundbars, including the Pioneer, had the Vizio as the lowest cost and overall winner and this was the 2.1 only soundbar. Reviewers liked the wider sound stage.
I still prefer the Pioneer for sonic accuracy. My soundbar has replaced a pair of very expensive Infinity speakers, amplifiers and dedicated CD player, over $ 3,000 worth of sound system and it was not much of a let down. My only complaint with the Pioneer is the lack of much sound stage and depth of the image. Other than that, the Pioneer has nearly the same sonic signature of my previous reference system. My requirements were different than most as I was looking for a sound bar to enhance television, which this does quite nicely, but also to listen to classical music.
I have received an early Christmas present of a 2-cd set of Handel's Messiah performed by the Mormon Tabernacle Choir with the Philadelphia Philharmonic Orchestra conducted by Eugene Ormancy. I owned this years ago on vinyl and my wife and I plan on setting aside at least two hours Sunday afternoon to listen to this. With any previous soundbar, including two that have passed through my home that cost in the neighborhood of $ 2,000.00, I would have given you my "Yeah, rihgt" look if someone suggested I listen to a wonderful performance of a great piece of music being played through a soundbar.
Sitting about 15' from the soundbar, the Pioneer sounds like a very good monophonic speaker (although I can still hear both channels). My preference is good mono (or stereo) over okay sounding multi-channel.
And if you value a surround experience, the rear speakers from the Vizio really do work. To my ears, this works much better than psuedo surround as practiced by Bose and Yamaha.