Built-in hierarchical DB? Neat!

DB access using same syntax as local variables? Neat!

Datetime epoch in 1841? Ok, sure.

Stringly typed with literally no other types? Uh…

Appendix 7 on this page http://www.faqs.org/faqs/m-technology-faq/part2/ : runs screaming into the night

It had some neat ideas, some alright ideas that were reasonable in the context it was created for, and some absolute nightmare fuel.