Quite nice add-on as replacement for "Speed Dial by Josep del Rio".
Looks promising but far from being perfect.

Pros:
+ Possibility of importing existing "Speed Dials" (but thumbnails itself are not imported!)

+ Mouse wheel support to scroll through existing groups

+ Dials can link to groups


Cons/Bugs/Missing:
- "No title on dials" does not work with transparent PNG images.

- Thumbs cannot defined to be exactly square format (e.g. 200 x 200), they become something like 200 x 194 instead (when set to 1:1). So I have to resize/crop all my created thumbnail images to that dimension otherwise they look ugly when they contain a background colour other than white (I am using the colour scheme "white"), even parts of the title may be visible on the edges. BTW: Most dial thumbnails online available are square.

- Thumbs for dials that link to a group are permanently changed. I have created custom thumb images for my groups, e.g. "Music". When ever I change (edit/add/delete) a dial within this group "Music", GSD ignores my custom thumb and generates a new one instead. So I have to tell GSD again and again, that it should use "my" Music-thumb – until my next change in that group ... :(  Annoying!

- I am missing to set margins for each group dial page. The dials are filled (sized) completely from top of the page to the bottom, which looks horrible (imo) and makes the pages overloaded and more difficult to read (heavy eye movement).

- Empty options "Visual" and "Settings" (pages include only "Coming soon"). Maybe I am too strict here, but this may be acceptable in an early alpha/beta but does not belong to a release version!

- Copying a dial does not work. Although I press the "Ctrl" while dragging a dial to another group and the symbol "+" is shown at the mouse cursor, the dial will be moved (instead of being copied).

But overall not bad albeit of some criticism.
.