Coleman ranks near the top. I am of corse a Coleman dealer so I will try not to be too biased here.
Coleman offers a comfortable, attractive, reliable and simple product with some innovative design features. They do not offer some the gadgets you might find on other tubs such as aroma therapy ands fiberoptics.
Since comfort and "attractive" are subjective, I will you be the judge of those.
Reliability - Coleman uses quality components such a Sta-Rite pumps, Pentair jets and Balboa M7 management system. Failure rate is quite low compared to the other brands I have sold.
Simple - No circulation pumps or automated massage. To quote others on this forum they do a good job on the TP design.
Massage - smart, doctor designed, jet placement. Foot releif zone provides a unique foot massage experience. Comfort collars provide excellent neck/shoulder massage.
Tub design has some nice features such as ABS sealed bottom, galvallume framing, raised rim/grab rail all the way around the tub. The quietest massage pumps I have heard anywhere.
For those looking for a little more sizzle you can add stainless accent package, digital colour optics (LED inside and along the perimeter), blower and stereo.
HTM