I like PowerTab a lot for what it is but it has its weaknesses. 1) you can't write only in stave without a tab 2) it has difficulty in notating properly pieces which are written in three voices or more on one stave. Powertab also seems to be not updated very often and I have the impression it is mostly the work of one programmer and not a team. These weaknesses aside I find it to be an excellent program and far superior to GuitarPro which I consider to be a poorly written and conceived program despite not being free. The other advantage to PowerTab is that there is an online tab community that collaborates and checks over each others tabs so most of the tabs in PowerTab on the internet are reasonably accurate while the percentage of accurate tabs written in GuitarPro or simply notepad style is quite low.