I recently bought a Yugo underfolder, which I love. IMO, the Yugo AK's are some of the best 7.62 AK's availible, especially the underfolders. I like the longer length of pull that the M70 offers and I also like how it has a "straight line stock". Its not nearly as uncomfortable to shoot as it might appear. The Yugo has increased weight and a staight line stock, which helps to manage recoil. I use recoil buffers in all my AK's and they make a big difference. My girlfriend put 300 rounds through my Yugo yesterday without incident. If it was uncomfortable, she wouldn't have shot it more than once. I personally don't prefer "asian" underfolders as recoil feels more pronounced
and muzzle jump seems to more of a problem. I use AK's as my "truck gun" and having a folder is imperative for this role. AK underfolders are compact without sacraficing shootability as some folders do. With the exception of Chinese Type 56, AKS74 and "Galil" type side folders, I really don't prefer them. They are usually crude steel bars which can be uncomfortable and sloppy. While they are convieniet, they compromise shooting performance. Underfolders are a much better choice for 7.62x39 AK's. Besides the obvious functional advantages, they are extremely cool.
When the next ban comes, they will be worth a fortuen...just like pre-ban underfolders were. The only non-folders I have are post-ban AK's and I won't buy another non-folder.