This is the second 6" GRAV bubbler I have owned. The only reason I purchased this one is that my first one recently met its demise thanks to an errant frisbee. Despite other reviews to the contrary, I've found this bubbler to be very durable and it has survived numerous <8" drops and tip-overs onto brick with only minor chips. It's no match for a frisbee though. :(
Initially I purchased this bubbler (sometime in 2015) because it had one key feature that was important to me personally: a sturdy base that gave me confidence when setting it down in the dark. This piece stands confidently and has a much better center-of-gravity than most bubblers I've found.
Overall, I find this item even more beautiful to look at than my previously all clear unit. The monochrome colors set this bubbler apart from most, and frankly, I love to own things that are unique.
Because of the shape of this bubbler, I do find it difficult to *completely* clean some small inner facets even with the most creative of pipe cleaner applications [picture some balloon animal shapes]. With that said, this is a very minor gripe.
Overall, I highly recommend this bubbler to anyone looking for sturdy, thoughtfully-designed bubbler with a unique scientific aesthetic.