Hi,
LMDE constantly receives updates. Its ISO images are updated now and then but users do not require to re-install it on their systems.
Pros:
* You don’t need to ever re-install the system. New versions of software and updates are continuously brought to you.
* It’s faster and more responsive than Ubuntu-based editions.
Cons:
* Although it’s using Romeo for unstable packages, LMDE continuously changes as it receives updates and new software. Compared to a frozen version of Linux Mint which changes very little once it’s publicly released, it’s not as stable. Things are likely to break more often but fixes can also come quicker. For this reason, LMDE requires a deeper knowledge and experience with Linux, dpkg and APT.
* Debian is a less user-friendly/desktop-ready base than Ubuntu. Expect some rough edges.

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