First, temperature does matter. I have found that some strains are harder to vape at higher temps. Also, you want to be vaping, not burning, knowing the temp allows you to do this. Second, those shitty vapes that are at an angle will have the weed fall on the heating element if you don't pack enough in. Third, balloons are nice, but you get more flavor from a whip style.
I use the natural goods vape. The best $175 I spent last year. Be careful who you let try it. I got lots of unwanted attention because of the vape. Lots of "you got to try the vape" conversions being had w/ strangers by my friends. Good luck and I hope you enjoy whatever you buy.