I bought a couple of these and I'm impressed with the build quality. They're not too deep either which is often a problem with racking.
I think they're a good price (£38 inc. VAT as of Aug 2018) though I didn't shop around. I just liked the look of them and bought a couple.
Good for 3u + 1u of Eurorack with appropriate fixtures and fittings. Or larger DIY projects with a custom faceplate maybe. I'm using them for actual 19" gear.
I'm not affiliated in any way, just sharing!