One of the things I remember about smoking...

...is that they always had a consistent experience, both in flavor and feeling.
Most people that vape consciously or unconsciously compare vaping to smoking. As cigarettes are by nature a one use item while most purchased equipment is made for long-term use, consistency seems to be the greatest challenge for equipment developers.
The perfect vape does exist, but we are not there yet. Time and technology will tell, but in the meantime, you want to prioritize whats important to you. Some factors may include:
1. consistency
2. flavor
3. battery life
4. look
5. durability
and the list goes one. what youll find, even with pros, is that no one has gotten the best vape yet, just a really good one. with so many specialized devices out there, your priorities will dictate whats best to buy.