StimuWrite 2 is a fantastic piece of software for managing your motivation. I have all the add-on packs and the ability to completely customise the typing sounds, background noise and images has helped me immensely. I would highly recommend this and think it's well worth paying for!
The only thing I'd say is that on one very low-spec machine, I did have a crash that lost some work, but I think that was an issue with my very basic laptop not being able to handle the visuals rather than the software itself being flawed. I'd already found that some of the moving background visuals had a slight bit of disruption at the point where they repeated the loop on that machine. I learned from that and made sure I was backing the text up more regularly than I normally would. I haven't had that issue on any other computer.
With that small caveat for folks with very low-spec machines, this is absolutely worth your time and money.
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