From 2Dgaming.net; I think this sums it up nicely:
PSP Go - It only does Everything WRONG
When I first heard about PSP Go, I was sure Sony would replace UMD with some sort of flash memory like their own Pro Duo Memory Sticks and start selling games on those instead of optical disks. It would have made perfect sense, and could have completely replaced UMDs for all existing PSPs. How wrong I was; they decided to completely do away with physical distribution of games. As it turns out this isn't the only obvious flaw, and PSP Go is a device that really makes very little sense, especially from a consumer's point of view.
While digital distribution may sound like a good thing, exclusive digital distribution is clearly bad for everyone but Sony. So you thought digital distribution would lead to very cheap prices because no physical copies need to be produced and shipped out? Sorry, that's not the way it's going to play out. What it really means is that Sony establishes a monopoly. They get total control over pricing and content availability (no imports) and they don't have to pay any middlemen. For you this means: No buying cheap used games. No reselling games. Don't like a game or finished a game and would like to trade it in for something new? Tough luck. Also, and maybe even more importantly: No cheap (older) games or special offers from retailers who are competing with other retailers. Sony decide what you can buy, and when, and at what price.
Now for the more obvious flaws:
- fewer features than previous PSPs, but at a crazy high price (250 EUR in Europe, that's 365 USD)
- DRM'd games are sold for up to 40 USD online
- built-in battery that can't be replaced
- smaller screen than previous PSPs
- unergonomic, cramped controls (especially the L/R buttons)
- old, outdated and error prone wireless protocol (802.11b)
- downloads can't be resumed and take forever
- PSP can't be used for anything else while downloading
- proprietary plug instead of USB as in previous PSPs, need to buy special Sony cords
For owners of previous PSPs:
- no way to convert your old games
- can't use your old Pro Duo memory sticks
- can't use your old charger and battery packs
It is beyond me how this abomination managed to make it out into he wild (well, at least into those stores who don't boycott it for obvious reasons). It doesn't reflect well on a company to release a product like this. And if you buy a PSP Go at this point, it doesn't reflect well on your state of mind.
However, there is hope for humanity: Out of personal interest I walked into a local Gamestop yesterday afternoon and asked how PSP Go was doing. Not a single preorder, so far zero sales.
Source: http://tinyurl.com/ye9fwy8
"Well certainly with the Xbox 360, we had some challenges at the launch. Once we identified that we took control of it. We wanted to do it right by our customers. Our customers are very important to us." -Larry "Major Nelson" Hryb (10/2013). Note: RRoD was fixed with the Jasper-revision 3 years after the launch of 360
"People don't pay attention to a lot of the details."-Yusuf Mehdi explaining why Xbone DRM scheme would succeed
"Fortunately we have a product for people who aren't able to get some form of connectivity; it's called Xbox 360,”-Don Mattrick
"The region locking of the 3DS wasn't done for profits on games"-MDMAlliance
Next Gen 
