Let's take them one at a time:
The Marvel has two bullets driven by only 2 aaa batteries - not enough power to get the job done. The reviews give it only 3 on a scale of 1-5.
Love handle - ditto just 2 aaa batteries - also it's only 1" diameter - pretty small for many. Because it's small the aaa batteries may work out ok.
Flores - ditto just 2 aaa batteries - this time trying to drive a 1-7/8" diameter vibe - and possibly two - the description is not clear. Not enough power.
White Heat - ditto just 2 aaa batteries. It's also 1" diameter and the clit vibe is no where near long enough to get from the vaginal opening to the clit for any woman I've ever been with.
You get the pattern - not enough power. That doesn't mean than some will not find them very useful - but you asked what I think - so...
Good luck and happy shopping.