Guitar tab gets a bad rap sometimes. I know I am guilty of taking shortcuts and don't spend enough time ear training but sometimes it is nice to pick up a guitar, grab some tab and just play a few songs. I think as with many things in life and music moderation is sometimes the best choice. A primary deficiency with a lot of internet guitar tab is the lack of rhythmic notation. Modern rock guitar can be notoriously difficult to correctly convey the appropriate rhythm. Songsterr is a relatively newcomer to online tab that solves this problem by tabbing out the rhythm and also giving you the option of hearing the tab. This makes the guitar tab much more useful. If you use this referral link below you (and I) get two free weeks of their PLUS service that allows access to added features on the site.