I know I'm new here so sorry for the lengthy post, just skip it if you don't care about just one more opinion on this thing. I wanted to share my thoughts and feelings on it.
I saw this device on a friends facebook page and it was basically a must-buy from the moment I saw it. The price, the stealth, the design, the touted features. It was a no-brainer. Now as far as the device delivering on these "touted features", I feel the most fair way to put it is that this device is somewhat inconsistent from a manufacturing standpoint. Everyone's having different experiences with it. Of course some of the reports are extremes and exaggerations, but I think it's fairly safe to say at this point that some of the Puffits are amazing and work perfectly for their owners while others don't. It's not a bad design or a poorly manufactured product, but it is inconsistent in the end for sure.
Anyway here's my take on the big issues:
1) I have never gotten highly visible vapor mists on exhalation. Maybe some light vapor mist once or twice. But I mean once or twice. I'm inexperienced to say the least when it comes to vapes. I've experimented with heat and draw speed, etc. So I don't know if it's user error or what, but I feel like there's air coming in from too many places for this device to produce visible vapors. The vapors are there though, even if you don't see them. Trust me :-)
2) I get that silicone taste almost immediately and it hasn't faded yet. And I cleaned it out a little bit by wiping around the heating chamber with a q-tip and wiping down the mouthpiece. HOWEVER, one should note I've had it for 6 days so the jury should still be out on this issue. Perhaps after more usage and a few more proper cleanings, it'll resolve itself.
3) My cap has never once even remotely been an issue. It took some getting used to in order to activate the Puffit properly (and stealthily) with the in-cap stirring device, but once I got used to it it's fine. It has NEVER came off on me by accident or anything like that. The in-cap stirrer is a very nice touch. So simple, so cheap, and so convenient. And hey, if you disagree, you never have to use it! That's the best part it's completely optional.
4) NEVER have I heard crackling or sizzling. If I did, I would discontinue usage immediately and try to get a replacement via warranty. It's NOT supposed to do that. The silicone taste is from silicone being heated up I assume. It might raise BPA levels or something and increase cancer risk, but I highly doubt that. Besides, everything in moderation!
Now again, if you had a different experience than me I don't think you're lying. If anything I believe you 100%. I think this device is inconsistent. In the end mine heats up fast and does it's job: produce vapors on the stealth. That's what this device was designed for. If you're out and about you can keep this thing in your pocket, activate it, take a few puffs and no one will be bothered with it. That's the beauty in this device and THATS WHAT YOU SHOULD BUY IT FOR. And no other reason. Its my first portable vape, and it's a bit of a letdown in the sense hat I'm not getting those satisfying visible vapors. As far as stealth goes though, this thing is as advertised. If you want those crazy huge vapormist hits, buy yourself something else (I bought a da buddah and am LOVING it as well). This has its purpose and it's very reasonably priced for the functionality in my personal opinion.