The Provari is the answer to "everything I've purchased has broken or disappointed me thus far" Thats all.
If you don't have the money for a Provari, then just do your research and find something in your price range that gets rave reviews and doesn't seem all that cheaply made & which gets good reviews.
I know from experience that any chromed mod is going to look like garbage within 6 months. The chroming wears right off with daily use. I do not know the quality of the stainless steel vamo, but I have heard that the buttons rattle, which reminds me of my lavatube. If the buttons are anything like the lavatube's buttons, they will eventually fail. So no rattly looking buttons & no chroming.
The stainless steel Zmax telescopic on the other hand, LOOKS well made, well machined, & well designed aesthetically, in comparison to the SS Vamo. It even looks heavy. I'm going to order this SS Zmax from Sigelei as soon as I've got the disposable money. Why am I going to order the SS Zmax Tele? Mainly because I can't afford a provari large right now, and I need a VV mod that uses an 18650 battery. I'm tired of having to switch out batteries every 40 minutes in my Provari Mini 18350. & I must get a Zmax, because my hobby & passion is helping new members here, and I can't compare the two most utilized VV mods on the market unless I buy a Zmax!
With that said, there are land mines in this game. While the Sigelei Zmax gets good reviews, the Smoktech SS Zmax has seen some troubles in winning over the public. Pbusardo recommends buying the Sigelei for instance. Its heavier & all around better made. Sigelei puts out cheap devices that are usually relatively well made. Smoktech puts out devices that aren't even designed all the way through, with tubes too short for button top batteries, no battery vent holes, huge spelling errors in their LED/OLED menus, jagged thread, &more! Smoktech represents everything that was wrong with cheap mods a couple years ago. Sigelei represents innovation right now. They are doing pretty well in making relatively well-made mods, without warranty of course. If they had a warranty program they could easily take over the market. I wouldn't put it past them either, they seem to be a good company with a good president.
Every once in a while, they do screw up... The Tmax for example. But they certainly aren't as bad as smoktech, with their... well... everything.
I still have my first mechanical mod,and guess what? It's the Smoktech sidewinder. It's over a year old and still works. It works with flattop batteries or button top batteries. My second mech mod was the telescope with vent holes. It lasted one month then failed. So yes,many of their product are not QCed,but I got one that still works.