miyasama trident maple

Today I picked up a young Trident Miyasama Yatsubusa and I was wondering what experiences other people have had with this kind of maple. I know they are dwarf and I have read some places that they tend to grow slow, bur does anyone have any tips or info they could share about this sub species?

Hi everyone! I've had this Miyasama Trident Maple for three seasons and this is the first time in the spring it has flowered and leafed out some weird leaf shape. The leaves are more elongated and narrower without much of the iconic three-toothed trident shape. I've attached a couple photos...