I took a look at these a few years back when I was broke as a joke and needed a RF. They are cheap, base models are like $100, I believe they do have an angle compensation model for like $150. Not sure what you are using it for (bow, rifle, just target practice) but if I were you and looking for a cheap rangefinder I would spend a little extra on reputable brands like Bushnell, Nikon, or Leupold. I ended up getting a Bushnell Chuck Adams for bow hunting and I like it a lot for what I paid. Really expensive glass is the popular call in this forum but sometimes you have to make due with a smaller budget, it's all about getting the most bang for your buck and budget.