Summary: This processor offers a big bang for the buck. I am currently ordering its successor, the E5200. Pentium dual core processors are inexpensive, but they still have enough performance to be useful.
Pros: This processor is fast enough for most uses. I managed to overclock mine to 2.8ghz. It runs very cool with my aftermarket cooler. Many people have been able to overclock this processor over 3 ghz.
Pros: Reliable. Fairly low power consumption. Dual core. Fast enough for most uses. 64-bit.
Cons: Can't decode 1080p H.264 in real time, unless you have a multithreaded decoder, which doesn't exist for Linux. No virtualization extensions. Stock cooler is pointless ... buy a better, quieter one.
Summary: Failed for no reason. Never overheated, had not been handled since installation. Just one month goes by, and machine won't post. Purchased a second of these exact processors (because the Intel RMA process is taking forever), dropped it in the machine, and everything worked great.
Pros: Quick, cheap for dual-core, good with desktop apps.
Cons: Failed after 1 month. Getting an RMA with Intel is like pulling teeth from a horse
Summary: Was a great upgrade over my previous CPU, a P4 Prescott 3.0 GHz. I was expecting only an improvement for multi-tasking, but even single applications are improved noticeably without any overclocking.