Outstanding tube, seems nearly indestructible, weighty throughout with a very solid and thick disc base. I got a "2nd quality" at an incredible bargain price, shipped free and in my hands in 3 days, and no one has yet discovered any "flaw", even on the sandblasting. Such a deal. Very nice ground glasswork, joints fit perfectly, nice length and filtration on the downstem, sturdy ice notches, great bowl with handle and screen, The only drawback that cost the star (and it's why I am a beaker guy who likes to have tubes on hand for variety and to suit other people's preferences) is when using ice, meltage causes need for added attention due to frequent need to drain or risk overflow, and oddly, attention has been known to lapse upon usage ;-) Wish I could go 4.5 on stars, this is one very fine tube!!!