Have bought two sticks The Competition Pro Retro and the Mini Monster,

Mini review,

Competition Pro Retro

Pros

-Buttons feel awesome - nice click
-Feels very solid
-Half the price of mini monster
-Classic looks

Cons

-Stick is quite stiff
-Only average comfort

Overall 6.5/10

Mini Monster Retro

Pros

-Sanwa sticks feels amazing
-Transparent case looks awesome
-Can be further customised with standard arcade parts (e.g. buttons, balltop etc)

Cons

-Expensive
-Buttons don't click (but are good quality)
-Hard edges on case are not comfortable

Overall 8/10

I much prefer the mini monster of the two,

I am still curious about the Arcade Evolution (AmigaKit) also and may eventually get one, the parts used to look like arcade parts and the case looks quite comfortable to use.