So, what would I recommend? If you are a Crucial fan and are partial to their modules, then this is a decent kit. However, 2.2v being the stock voltage is a little hardcore. If you are planning to overclock, then it won't be a problem. DDR2-900 was just as possible without increasing the voltage... and at the same timings.
Better chips would have made all the difference in these modules I feel. The stock voltage of 2.2v wasn't just set by Crucial, it is actually mandatory to retain 100% stability. That's rather high if you are planning to do no overclocking at all. This is actually the first kit I've come across that hasn't worked on less voltage than noted... unless we count value sticks. But, that's not what these are :-)
Malo me ovo pokolebalo !