I had the alpine w205 for 4 months and finally the blackbird 2 arrived in november. I sent the blackbird 2 back a week later, sold my alpine w205 and ordered a D3 and a tom tom go 920 portable.
Reasons I wanted the alpine setup:
I have a need for both portable and in dash. I travel a bit renting cars, so I needed a portable.
with an ipod, I like having the big screen, so the double din was a big draw.
imo, the blackbird was a bit overpriced when compared with other portables.
I paid 700, vs my tom tom 920.
as far as I could tell, alpine never released updated maps for the blackbird 1, and the blackbird 2 had no way to upgrade, when you connect it to your pc, it is just a memory card reader.
it was quite big and bulky for a portable, despite not offering better battery time compared to the tomtom.
as a portable unit, it was not worth 200 more than the tomtom, who updates their maps anually, plus there are vast support resources on the web for POIs map corrections etc.
for the W205, it was a disappointment from the start, if I had to do it all over again, I would have sent it back immediatly.
to start, the sound quality is not that good compared to my single din alpine I had before it. there isnt much adjustment, or equilizers either, that requires extra sound processors. If you want to hack it to enable making changes under way to the navigation, or to watch video, you have to buy a pac module. the pioneers has an easy hack.
ipod controls on the pioneer imo are better
xm is better on the pioneer, the xm icons actually display.
backgrounds and color schemes are easier to customize on the pioneer, even the color of the buttons.
the pioneer has a volume KNOB which I prefer.
the navigation is always with you.
the navigation is dvd based, pioneer seems to release new maps annually.
I know pioneer navigation has its issues, but most of the time I find it to be pretty accurate.
1 thing I liked better about the alpine was the dimmer was based on an ambient light sensor, which always kept it at a comfortable level, the pioneers needs to be hardwired into my car, I have yet to find the correct wire to tap into.
good luck with it, hope you have better results than I did.