I have been reading about this LP cleaner for a long time. I have been using my VPI 16.5 RCM with L'art Du Son solution for last 10 years and very happy with the performance. This year I thought I must get an ultrasonic cleaner to see if it can offer any significant improvement. I got the old model. It reached me last week. Then I realised I need good quality distilled water to use it effectively. After some research I found a place and I got 5 litre of laboratory grade 99% pure distilled water. The unit comes with 2 bottles of cleaning solution and 1 bottle mixed with 4.5 litres of water can clean 100 records. I prepared the unit and cleaned 3 lps which were already cleaned with VPI RCM several times. All the LPs although looked mint had few pops and crackle sound. I was expecting that lps will sound the same but without any pops and crackle. I played the lps and I noticed although this machine does not fully eliminate pops and crackle but minimised them a lot and there is a huge improvement in the overall sound. The sound has become more dynamic, enhanced bass and more three dimensional presentation. It is like playing a better copy of the lp with a new cartridge. I have never experienced such an improvement from a passive device. Now I am convinced that ultrasonic cleaning is absolutely essential for vinyl playback.