One thing that leaves a bad taste in my mouth is the fact that only about 6 months ago, the RPi people were claiming that a more powerful model wouldn't be available until 2017. However, this new model must surely have been in a fairly advanced stage of development at that time, so that statement was basically a lie designed to protect their existing product lines. IMHO, anyone who has bought a RPi in the past few months has the right to feel a little cheated.
I'm also disapponted that the RPi foundation has consistently failed to deliver on the software front. Ever since the RPi first appeared, the foundation has issued numerous vague promises about how they were working with Broadcom to produce open source drivers for the GPU, and/or to release data on how to program the GPU's registers so that the open source community could write their own drivers. But nothing ever seems to materialise. Last time I checked (which was admittedly several months ago) the RPi was still dependent upon a closed source binary blob, and it still didn't have a hardware accelerated desktop (although I understand that one is in the pipeline). As far as I'm concerned that's just not good enough. I don't understand how SOC manufacturers think it's acceptable to release a SOC without providing drivers for the SOC's target operating system.
However, if I try to put all of those misgivings aside and just concentrate on the hardware, I have to say that this latest iteration looks pretty damn good. I think they might finally have nailed it this time. Pretty much every issue I had with the original Pi (apart from poor software support) has been fixed. If I'm being super picky, the lack of a VGA port still irritates me (why can't they at least provide some VGA header pins?) but that's not a deal breaker.