I’m wasn’t really a tub person, so I can say I honestly didn’t do much research when buying this tub for my bathroom remodel.  WOW!  I am a tub person now.  This tub is insulated so well the temperature stays the same the entire time you are in it!  I’ve tested it and soaked for more than an hour.  
This tub is extremely attractive and the bonus of having the plumbing included is a nice times saver.