For me, the only reason I flashed/used Mr. Spiv's firmware was because I wanted to start directly into Wind-Ups. You can run Wind-Ups using the freelauncher to see if you like it, its a matter of opinion. Even if you do like it but only use it occasionally, you can still start it that way, but with the multi-firmware it books directly into Wind-Ups if you choose. For me, that's the quickest way to use my GP32 and I like it, but again, as posted by Hando, it is a risk to upgrade your firmware and you do not NEED to.