We started with the Medium Machinery injection molder. Having not much experience with molding at all, we thought that we would be fine as long as the injection volume of the machine would be large enough for our parts. We learned quickly that there is much more to it. The two major limitations (among others) of this machine are clamping force and injection speed. Having only 12t of clamping force means you are limited to parts that have a projected area of about 3.5 in3 or less (for ABS). If your part has a larger projected area, you might not be able to keep your mold clamped shut. Also, those hydraulic jacks are pretty slow so you often wont be able to fill larger molds unless you very accurately pre-heat your molds to just the right temperature (not as easy to do as it sounds). We spent countless hours making the first batch of parts and then decided that our parts are just too large, thin walled, or complex to mold efficiently on this machine. Not saying that it is a bad machine, it just wasn't right for what we were doing. For smaller parts and hobby injection molding it might just be perfect. I eventually decided to get a Dr. Boy 50T2 which makes life a hole lot easier (and my wallet lighter :/ )