Pex is here for a reason!
A soldered fitting are very inconsistent in hard to reach areas such as too close to the ground, wall or ceiling and the torch can not circle the fittings, nor can a proper visual inspection be performed. Press fittings and compression fittings have much more of a consistent connection, no matter how close to a surface the pipe is, if the press fitting is pressed and compression fitting completed, then there is a 100% consistency that is able to be provided by the service provider and any defects from the manufacture are insured and any water damaged occurred is also insured by the manufacturing company.
Pex pipe allows more flexibility for colder climates having less frequent breaks due to the expansion and movement of water pressure and temperature changes.