I agree, I have the go+ unlimited, and that's definitely worth the wallop, I would pay just to be able to hear anything I want, often I've been recommended songs by folk and I can hear the tunes.
I think one of the features I use the most is the 'Replace' - this allows me to overwrite a song with another, it happens so often, I'll have a better mix, and I'll just replace the old one for the new one, it's not possible without the enhanced subscription.
The other nice bits are now 'Distribute' (which allows you to release your own tracks for money...and now you can add a direct paypal link so kind folk can donate money to help a struggling artist...The Stats are always engaging..and will keep you amused for hours.
Hope this helps man.
it's money well spent.