I have had my Sundance Hawthorne for about close to a month, no cir. pump but do have the ozone and LED lights, Cover lift, steps and chose the Celestine color mahogany cabinet the tub has texture which makes it very nice to sit in and wipe down. The settings are very easy to understand and run, I chose the no heat call two cycles per day for 2 hours as my tub stays one to two degree close to 103 where i like it. so during the run period it heats to 103 and does not heat the tub during the day for a HEAT call, as it would on the standard setting if say the heat would drop then the pump would come on and heat for a degree then turn off.
The LED lights are great on this tub 16 different settings and a strobe flash, crazy but my teen boys like that one. Water fall is very nice to hear. The tub sits just outside by beadroom and when it kicks on I hardly hear it really. I would however recommend that you run a 220 6oamp to the tub instead of a 50amp this will let you run both pumps and the heater at the same time just a convenience. DO FOLLOW WATERBEARS THREE STEP STARTUP AS IT WAS VERY SIMPLE AND MY WATER IS CRYSTAL CLEAR AND SOFT AND AT 545 gallons you dont want to be messing with chems all the time thats allot of water to be managing with guest over waiting to get in, LOL I just use Bromine and tabs and shock with bleach use 20 mule borax for ph use and baking soda these seem to be the cheapest and easiest way in my opinion and purist. I have ordered a k-2106 test kit and other than that I love this tub, I am in it twice a day every day so far. OH be sure to keep the bromine low if you have sensitive skin as it may give you a rash, I had that the first week, mine is at 3 now and really works well for me just saying. Hope this helps, I did a lot of reading on this forum prior and so glad I went with a top tub, and listen to this forum and all the help I got from he posters.