Avalons are ugly to look at but from what i've read they seem reliable and reasonably efficient compared to any GPU rig.
The first part of the quoted statement is subjective. I find Avalons to be fine looking machines.
The second part of that sentence is rather silly. Avalons are not "reasonably efficient compared to any GPU rig". Avalons are an order of magnitude more efficient than the most efficient GPU rig. There's no way you could assemble anything near 66Gh/s of Bitcoin mining hardware based on GPUs and have them consume 620w. Not even close.