@emmdeemo,
Tommy sent a video of a Lily prototype to those of us who got the Lily prior to it's release. I haven't posted it as I presume he wants to release a new video with the final version (plus it's probably private and won't work anyway). In this video he loads the bowl three quarters of the way. That's a fair bit more than the official instructions. In my excitement I missed this and actually filled the bowl the whole way. There was no combustion and no charring whatsoever although the herb did darken more quickly and to a greater extent than Daisy with a slightly larger load (the load I had in Lily was the same as a slightly under filled T1 bowl, which would be about the same as in a Solo stem if you suck in the herb to level than press it in a couple mm). It did feel like there would be a greater chance of combustion than in Daisy, but manageable none the less. Easier to get away with than a full bowl in the Lotus.
I can't really comment on taste. After one bowl, the taste of the natural finishing on the wood is quite prominent but those who have had Daisy for a while report that it fades a lot. It does seem that it will give intense flavor from the herb when compared to Solo and Lotus, which while quite pure, is also quite subtle.
Efficiency, I suspect, will be better than Solo but after one bowl that I didn't take all the way, I couldn't answer with any certainty.
Edit:
@puddleglum, Lily's mouthpiece stem has an outer diameter of 12mm. Glass is 2mm thick.