I picked and tasted mine 2 weeks ago, it's pretty big (1st fruit of the tree) -it's already a bit too ripe off the tree it looks like- (Turns out, that there is a second small fruit I didn't see before, hidden behind the leaves.)
It tasted 'very refreshing" to me, enough sweetness with very little sourness, have the typical Nectarine taste but very juicy (from the Plump side parent?); my wife didn't detect this sourness, "very sweet" she said...
Here's a couple of photos:
My next stone fruit taste test is Burgundy plump, just picked the 1st and only today...
edit: not sure about weight: removed.