I bought the Surface RT at launch last year; at the time I already had a iPad1, iPad2, the Asus Transformer and a Windows traditional tablet. When I need a tablet, I still usually use the iPad2. I am used to the entertainement and audio/video apps and I find the general experience good enough. The Safari web browser is not the greatest thing on this tablet; I tap to the Chrome app when needed.
The Asus Transformer (Android) has better browser and better IT-related apps; I use it for Wi-Fi and network scanners, terminal emulators etc. I usually leave it at the office.
The surface RT strongly reminds me of the old-style Windows tablets. The hardware build is top-quality, even better than Apple (magsafe power supply, integral metal stand etc). But the app selection is lacking. Best free apps are the preloaded office 2013 home and student suite and the Internet Explorer 10 browser. I use it rarely, often as traditional portable, hooked up to keyboard, mouse, and sometimes external full-hd monitor. It also has a very good remote resktop client. Surface Pro should be the same, without the no-legacy-windows-app limitation but with the added weight and limited battery time of a traditional notebook. It could be a good choice if you need a new laptop with touch features.