You can define macros on most keys, not just the keys the manual says you can define macros on.

It's a good remote compared to other non JP1 remotes (at $14 it's slightly higher price than competing non learning non JP1 remotes and moderately higher capability).

If you add the eeprom, jumper and JP1 connector, it becomes a nice JP1 remote. Unless you're real insistent about having a remote this small (typical JP1 remotes are too big for many users) and/or real comfortable soldering, it won't be worth the trouble vs. buying a JP1 remote that doesn't need soldering.