Pros : Good price, but you get what you pay for.
Cons : Engine started smoking after 20 minutes of light use, it is very difficult to adjust the top wheel so the belts stay put, and it only takes less than a second for a belt to slide to the left and jam the machine or slide to the right and tear the belt. Once I finally did get it adjusted, it was very difficult to change the belts because of the bottom tray (attached), and I had to spend 40 minutes re-adjusting it every single belt change (with risk of ruining more belts.) The cooling system is also pretty crappy-the sponge often gets sucked up and stuck in the top and you constantly have to re-adjust it.
Other Thoughts : This product might be good for a hobbyist who won't use it very often at all and rarely changes belts, but for anyone who uses it regularly, save yourself time and money and just buy a higher quality one from the start.