This is an excellent hot tub!  It has a tight-fitting cover and heats up so much faster than the "plug-and-play" 110v models.  Yes, there are some additional costs for the electrical run, approx $300-$500 if you install yourself, or a bit more if you need to hire it done. But all in all, if you're going to spend $4000+ on a cheapy, you should just go with the best.  The Sol 72 (actually, it is a Balboa brand) has a ton of great features from the programmable Hi/Low temp range to the waterfall, headrests, enhanced water clarity provided by the ionizer, and locking cover.  As others have pointed out, the manual is not the greatest as it has been a "word-in-place" translation from Chinese, but keep in mind that language is a complex thing and the basic information is there if you just read between the lines and gain what the author intended.  I would definitely recommend this model to anyone looking for a spa!