There are several things to consider before deciding on purchasing Thermaltake's RamOrb coolers. The first is the type of memory you are planning to use. To be honest the G.Skill memory supplied to us by Thermaltake isn't really a module that suffers from high temperatures; it is actually one of the most efficient modules on the market and that is why it is in such high demand to enthusiasts. My Winchip memory running at 1200MHz and using 2.4 Volts on the other hand would benefit a great deal from the RamOrb.
The next consideration is your memory packaging. My early tests with DDR2 several years ago resulted in several dead modules. This was due to the way Crucial mounted their coolers to the memory and it made removal deadly, at least for the RAM. Make sure you run a search and investigate ways to remove your ram from their factory applied coolers. There are a few sure fire ways to achieve your goal of removing the sticks, but this varies depending on how they were put together. Spending a solid hour researching the proper method for your modules may just save you a few dollars in the end. With that said, our own Andrew Jones constructed a guide not too long ago which delves into ways of removing the spreaders with as little risk as possible.
The Thermaltake RamOrb is designed to cool your memory and it does a good job of it. The benefits of cooler running memory are still up in the air, but with todays BGA packaging running memory at a lower temperature is a sure fire way to extend the life of the product. Users with little case air circulation should take note that a case running with a 40C ambient air temperature and high performance memory could lead to damaged solder between the memory PCB and the BGA modules over time due to the heat cycles.
On the appearance side of things, the RamOrb adds to the overall look of your system if you have a case window. If you frequent LAN parties a few people will notice your trick RAM coolers and ask about them the instant they are seen. Inside the case the blue LED adds to your bling factor and does it while actually cooling.