I want to thank the individuals who responded to my questions, very helpful. I seldom write reviews as I believe them to be subjective by nature. I feel that the build quality and features of this item and the opportunity to assist fellow audiophiles make the effort worthwhile. I own two other ultrasonic units which I use for firearms and miscellaneous items. I additionally tested two other ultrasonic record cleaners. This is a high quality very user friendly unit and the sound quality of the cleaned vinyl is definitely superior to any other cleaning process I have previously used. High end and midrange in particular is much cleaner and more open. I can often play the record at a two to three step lower volume. Overall I couldn't be happier and cleaning ten records at a time is a God send.
As with all ultrasonic units, I recommend levelling the device. I purchased an 11"x17" cutting board and self adhesive stereo component spikes from Amazon...ten minute project plus adjustment time. I heat the unit to 87 degrees using a remote aquarium thermometer, degas and shut down the heater. The unit maintains a approximately 88-89 degrees during cleaning. Heating the solution does seem to improve cleaning. After a rinse cycle I dry the vinyl with a low end manual record vac I bought years ago. I believe it is superior to air drying.
My son, the anal one, told me to state that this is not a paid endorsement.

It is quiet enough to watch tv with it running in the room. The records come out so clean they almost glow. The dry cycle drys them without so much as a drop left on the records. I did 1/4 of my record collection the first day of having it. Don't hesitate on the price being high. Its completely worth it. No buyers regret here!!!

This ultrasonic cleaner does a very good job cleaning records that are not filthy - for that pre-cleaning needs to be done. This is true for all USC (ultrasonic cleaners). Cleaning 10 records at a time is a great convenience and the system works quite well.
Four of the label protectors as delivered were missing rubber o-rings. A call to Isonic and they replaced them immediately. Another question I had was answered immediately also.
I limit to 4 stars mainly because I feel that there is some room for improvement with the machine - but these are not major. Main one is control of bath temperature for record cleaning. Lowest setting is 104F degrees - too high for records. I heat bath to 90-95 degrees and turn it off. Bath remains near that temp for 10 minute cleaning.
Also, I do not recommend the cleaning fluid as sent with unit. Though more complicated, I make my own as outlined on various internet sites including on Arthur Salvatore at his High End Audio pages under Ultrasonic.
I do recommend this unit to anyone wanting to get the best cleaning and best sound from their records.
This was the BIG and GOOD surprise for me about USC - the LPs properly cleaned this way SOUND MUCH BETTER.
I wish the machine was not so expensive, but in my experienced opinion compared to alternatives this complete package is a very worthwhile investment.
***** 1/5/2020*****
Addendum: About 4 months in and nearly 500 records cleaned.
There is a bit of a learning curve to getting the best out of the ultrasonic cleaning process - do & learn.
Machine and accessories are holding up just fine. I've used a vacuum type VPI machine with various cleaning fluids for many years (still use the VPI in a rinse process) but the bottom line is that LPs cleaned by this machine SOUND BETTER than those done via scrub and vacuum process. That FACT means a whole lot to this audiophile/music lover.
I recommend this machine as a very good value - if you value your records and how they sound.,
**** 8/82021****
Over a thousand LPs cleaned. This machine is working PERFECTLY and looks brand new. It's built like a tank... well it IS mostly a tank. ðŸ˜
**** 7/17/23 ****
Well OVER 1500 records cleaned and my unit is operating PERFECTLY and receives my HIGHEST recommendation.
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I bought this primarily to clean my shellac 78 RPM records although I have also used it for my vinyl LP 33 1/3 RPM records. While the description claims it will clean both, for 78s you have to fill the tank to the absolute top so be careful not to jostle the unit or you might leak water into the cabinet. My other complaint is that the spacers provided to protect the record label can actually cover part of the recording on a 78 if it's a longer song (grooves closer to the center hole). With that said, it does do a fantastic job of removing debris. I run my 78s through three 15 minute passes and they come out WAY better. Big difference in the sound quality after cleaning. So if you've got $800+ bucks to spend and a bunch of dirty records, this is the machine for you.

It is good, but is not easy to use.