After a couple months with the Legacy, it's definitely one of my top 2 used vapes. I'm basically only using the Legacy and my SplinterZ, which I've got TC dialed-in perfectly.
I use the Legacy without a screen in on-demand mode, but for session mode I placed a 1inch brass screen over the bowl and then used my TerpPen to quickly push the screen down into the bowl. This worked perfectly, the TerpPen cap is the perfect size to fit in the bowl with just enough room around the sides to "mold" the screen to the walls of the legacy. And since 1" brass screens are 10/$1 at my local head shop, this is a super cheap option.
Anyway 350º - 375º in session mode works perfectly for me. First hit is a bit week with the screen(at 350º), but absolutely amazing after that. No need to stir, and no charring.
If I remove the screen I used on-demand mode and set it so around 280 - 300 F. I know that sounds crazy low, but it works for me. I pretty much draw as it's heating and release as soon as it reaches temp. This produces great clouds and full rich satisfying "mouthfeel". It's very similar to low temping on my Ghost, but the Legacy is WAY easier to load and change temps mid session than the Ghost.
I still have my FF2+ and I do like to use that occasionally at night before bed. The long deep breaths that that thing asks for wear me out a bit, so it's perfect for drifting off to sleep. And I'm sorry but the FF still has more flavor than any vape I've tried, can't imagine giving that one up.
So the Legacy is a bit of a beast(chars relatively easily) and temp control can be a bit finicky, but it's so easy to adjust temps that that isn't much of a problem. Plus after a few weeks with it, you'll know (by taste) if your getting close to charring, so I almost always catch myself and either drop the temp a bit, take shorter draws or release the heat button earlier (in On-demand) mode. I think because of these things it's a bit hard to recommend the Legacy to first-timer vapers, but if you have the patience to "work with the device" a bit I think just about anyone can find a way to use it that works for them. Even my wife loves the Legacy (session mode with screen). She's a "set and forget, I don't want to think about 'settings' and 'buttons' when I'm vaping" person. She just sets it at 350º and is happy to have maybe 1 tasty but not visibly vapory draw, because she knows all the next draws will be perfect. Basically the Legacy is the only device she wants to use (and I do have quite a collection) so I guess that says something about it.