I used a few building some hobbyist level stuff and I found it easy to use, tons of software and documentation available in proper english and if you want to build network/internet enabled stuff it's way cheaper than using arduino, pic based stuff or any other thing I found available.
Latest example: I built a nixie clock with ntp sync. Is the pi wildly overpowered? Of course, but the A+ + 8gb microsd card ran me ~22eur plus the cost of a 8gb microsd and a wi-fi adapter (I had those and don't remember the original prices but probably another 10eur). I couln't find any arduino/microchip based solution with wi-fi that was even close to this price. The fact that it runs linux, can pull it's code from git has a sound card and hdmi for future use ideas is a nice bonus too.
I've had friends use allwinner based boards for similar stuff and none had the simple experience the pi provides.
About the new pi I'm much more interested if the USB bus still has the same bugs , if the ethernet is still attached to a usb hub chip, than the processor power it has. If I need networking / storage / multimedia performance I'll buy the proper tool for the job with proven reliability and open source software available not a cheap arm board no matter how good the specs sound on paper.