The D-020 bubbler has gained quite the reputation on FuckCombustion.com, and always being in the market for good cheap glass I ordered two of them to see what the fuss was about. The bubbler functions very well. Both units were near flawless and I can see why people love them. It has even diffusion with moderately good stacking by the 10 slit perc. The chamber is nice and small, perfect vaping with flavor in mind. There is little to no drag or chug. Here is a vid of me milking my Arizer Solo with the D-020:

It is nearly perfect for use with the solo, however it does leave your unit very close to your face. If you need cheap quality glass for use with vaporizers consider the D-020, they have other nice pieces available as well. Check out DHgate.com, seller: Sunshinestore (Be warned there is a lot of crap on DHgate so stick to reputable sellers). Shipping was 14 days from the date of ordering to get to Canada, not bad considering its coming from China. Packaging was bombproof, and I payed no custom fees. The D-020 is a beautiful piece and a perfect match for the solo consider it as your next purchase to up your vaporization game.