I've seen a lot of debate out there about this.
I did my own research and reached the conclusion that, for me, going with the Sinden gus was the path of least resistance. I am skilled enough in electronics to do things on my own, but I decided that for what Sinden was delivering along with continual development on them, that they would work for me.
I was right. They are solid. Not perfect, as they require tweaking the software (as Fursphere mentioned correctly). They are also kind of sensitive to room lighting (turning off any lights that will cause glare on your screen is important, but that's not that bad and easy to work around (turn off the lights while playing).
There are other solutions (Gun4IR, etc...) and really you just have to research and decide what path you're wanting to follow. I'm not sure there's a bad decision to made as they all seem to work and all seem to have about the same price point once all is said and done.
Good luck and keep us updated.