with some $20 more you can build a amd 5350 or a Intel j9200 with some 4 port pcie network card and have any os on a fully capable computer, probably using less power than that thing.
Less power? The j9200 has a TDP of 10W and an average usage of 8W [1]. The entire ERLite unit, not just the CPU, has a maximum power draw of 7W [2]
As others have mentioned however, network offloading on these units is the selling point for these machines. It's also a great value for those looking explicitly for a MIPS or big-endian arch.
with some $20 more you can build a amd 5350 or a Intel j9200 with some 4 port pcie network card and have any os on a fully capable computer, probably using less power than that thing.