RouterOS performance?

Hi, We're looking at using Mikrotik's RouterOS for some some sort of software routing solution as part of our network in combination with supervised layer3 switching doing most likely some sort of limited BGP. Does anyone else here run it? Is it any good? Is it better than e.g. vyatta? If RouterOS and Vyatta both suck, is there any decent software routing solution? Our network is small (4 /24s) and we only need to push roughly 1-2gbit at the moment. Experiences with both would be appreciated. Thanks! William