Never tried it. Though they have decent poke these days, I'm not sure Android hardware is man enough to run a full-blown 3D-CAD package – expect sluggish. Some of the Android products are readers rather than editors, which is practical.
To me though the biggest objection is the environment and tiny screen. I struggle to think CAD unless there's peace and quiet, couldn't do it on a crowded train. But the really big problem is screen size. CAD is much easier with a giant screen, ideally two big screens. Or even three. Also with table space for a hefty mouse, and – for serious CAD – a 3D-mouse as well. Plus a full-sized keypad, a notebook, references, and maybe bits of the real thing to measure.
Although CAD works OK on a laptop, it's downright inferior to running the same software on a fast workstation with two 24" screens. I think an Android would drive me mad, even a 10" tablet.
Please try it and report back. My objection to small screens is partly because my eyesight isn't as good as it used to be.
Dave