Slice patterns in Nightly Rust

[Dennis Ritchie via Digitalmars-d]

Recently published documentation Nightly Rust. I saw this:
https://doc.rust-lang.org/nightly/book/slice-patterns.html

What do you think about this: a terrible thing or a cool feature?

fn is_symmetric(list: &[u32]) -> bool {
     match list {
         [] | [_] => true,
         [x, inside.., y] if x == y => is_symmetric(inside),
         _ => false
     }
}

fn main() {
     let sym = &[0, 1, 4, 2, 4, 1, 0];
     assert!(is_symmetric(sym));

     let not_sym = &[0, 1, 7, 2, 4, 1, 0];
     assert!(!is_symmetric(not_sym));
}

http://is.gd/TvrXSn

I see this competition slices of D. Also seen are not very clear 
design.