I picked the 50mm stem to put on my street bike. The machining is great, it's super light, and I couldn't be more pleased. I have a 50mm Straitline SSC on another bike, and while it's great for bling factor, it's a bit bulkier and slightly heavier. Not to mention that I paid close to $100 for the thing. Considering I grabbed this Sunline V1 off of Chainlove for $35 (I've seen them as low as $25 recently), it's one deal you can't beat. Grab one if you see it pop up again. Even if you don't think you need one now, throw it in the parts closet, because for $25 bucks, you're not going to find anything better out there.