Built a few of these AM1 budget systems using a few different processors in the range.
This is the quad core offering for the new cost effective Socket AM1, the higher models are using the Athlon moniker, rather than the lower priced models which are branded Sempron.
Socket AM1 is designed to offer a low cost, small size and low power consumption platform.
The Athlon 5350 has 4 Jaguar cores clocked at 2.05GHz, with 2 MB of cache. Performance wise it's a good step up over the cheapest current offering which is the Sempron 2650 which is a dual core processor. The Athlon 5350 is currently the highest model out of the 4 initial offerings.
Day to day it's quite good for normal tasks esp multi threaded performance, best case it's comparable to a super budget desktop processor. Graphics are built in, with the Radeon HD 8400 but don't expect miracles it's handy enough for HD video playback, and a bit of light to moderate gaming at modest settings.
I quite like the platform because it's good value for money and this processor is more than enough for a media pc or office pc. This is the one to go for if you do the odd bit of photo editing (nothing too dramatic) or you do a few more intensive tasks. Again don't expect this to offer mainstream desktop performance but it's a step up over some of the small form factor CPU's by a decent margin.
If you are gaming and want an all in one solution the AMD A series processors are a better bet. This is ideal for a media pc and normal home use, At present the CPU range is small though it should expand a bit over time. But do look at your options for around the asking price or a little more you can buy a desktop processor which will handle harder workloads better. Think..small, and low cost and you'll be quite happy. Price could be a bit better though it's a little high for what's on offer.