The SR 300 and SR 500 are the newest models from Fresh Beans Inc. Both are an improvement over the older Fresh Roast +8. There are a few things I wish were different about these roasters, but in the end they're a good, economical choice, so long as you're willing to pay attention to a few details. The SR 300 features the most simple interface: you just put the beans in and stop the roast when it's as dark as you like. The SR 500 adds in the ability to control the roast a bit by changing the speed of the fan and the heating element power.