Pros:
A very catchy name which can't be forgotten!
Light-sized code is good for everyone ...creator, host and visitor.
Size limit can challenge a developer for more creativity.

Cons:
No custom domain name available.
Not much explanation is available about the product.
Hasn't got a professional look.
Looks like a one man show with no disclosure for funding sources to sustain the project.
A constant prayer for donation make it look like an unsustainable project to me.