My pre-owned Pro Clear 150 has been running for a week now and I haven't heard anything bad about it (despite hours and hours of research), and I have nothing bad at all to say about it. It took a day or two for it to break in, but once it kicked into high gear it started roaring! This is my first skimmer, but it is an obviously a very advantageous design, easy to tune and a breeze to maintain. I recommend this skimmer 100%. I cruised ebay for a month or two and got it for a steal. If I ever find a flaw, I will be sure to revise this testimony. Until then, I would say the (more than twice what I paid) brand new value of $149 is still worth every penny of skimmer power you will get.