It's very easy to use, there are lots of options that you can set for your configuration. There is also a GUI which makes it easier to get all kinds of complex setups done in just one or two clicks! I would say that sometimes when using multiple machines at once (as most people do), certain things don't always work like they should be working if you're doing something with more than 2 VMs running simultaneously - but this is usually because my setup isn't perfect yet :). Just try out different configurations until you find what works best for you. The performance difference between real hardware, qemu simulated hardwares is huge, so being able to test software without having to buy specific hardware, saves me tons of time. Also, I'm not limited by physical space anymore, since i have access to hundreds of powerful servers around the world through internet connections. We've used it as.
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