So if one has a nice set of 1.25" Plossls and a .965" adapter or hybrid diagonal, there is no particular advantage in these..
I've got five of them, they are terrific eyepieces for the price. Same optics as in their 1.25" barrels but fitted with .965" barrels. I believe some or all are now out of production so would advise you grab them while you can.
They may not reach focus on every single telescope.
Just that they get you an inch closer in if you need to accommodate focus.