I recently bought 4 used ones and a ton of the potty pads from someone on Facebook. I have also bought them new. Aside from being a pain to learn how to wash and dry without it taking forever to dry, they've been okay. The used ones I bought look like they've been thru hell but they still absorb and do the job like my newer ones. They did shrink tho, but I don't know how the previous cared for them.
I am definitely not a fan of the pockets. My pigs don't use the pockets. I just checked the site and it looks like they do offer them w/o pockets now.
For the price, you could get handmade fleece liners from Etsy shops. Depending on the size and the design (plain vs a design) of the fleece, you could get a deal of something like 2 liners for $60 instead of one liner for $50 to 55.
I'd say it's hit or miss, depends what you want and if you can handle the price. They do the job, but the price and the long drying time can be a negative point.