I'll be playing one at Strategicon this weekend, so I'll let you know.
After doing the build, what I'm seeing in the mechanics are:
* Although flourishes take up the most column inches, they're actually pretty niche part of the build. They're only usable 2-5 times per long rest; they require a hit, they share a resource with other uses of inspiration, and since they require a hit, they have a high risk/high reward component.
* Being a full caster plus a getting a fighting style and extra attack means your damage can come from your weapons, and your spells can focus on utility. This is how I like to build gishes, and what attracted me to the build.
* Level 5 might feel awkward since you get Extra Attack at 6.
* Lots of skills and expertise mean you're very much a jack of all trades; the build is highly flexible and and will be pretty good at most things.
I'll be playing a Tortle Bard (swords) 4 / Druid (land) 1. I picked up a Staff of the Woodlands via DM rewards, so my current plan is to max CHA at 14, and scale offensively via Wisdom with Shillelagh + PAM. Staff weapon is a focus for both classes. Tortle shell and shield from druid fix my AC at 19 without any STR or DEX investment. Seems like there are enough good spells (and good magical secrets) that I don't need to max my casting stat as a bard. Splitting between druid and bard means I don't compromise on spell slots, just spell levels.
I think a fully optimized build would be a half-elf that dips a 1-3 levels of Hexblade instead, scaling purely off of CHA, having more skills, slightly higher ability scores and short rest spell slots, but I was committed to playing a Tortle in AL season 7 due to how their PHB + 1 rules work.
I'm excited; we'll see how it plays at the table.