According to this book, life in the North Korean army isn’t so bad:

Contrary to rumors of brutality among the ranks, according to a book by a North Korean defector, there is no corporal punishment and detention within the North Korean Army.

Instead, ranked officers draw a square on the practice grounds and have the rule-breakers do a "formal march" (the North Korean parade walk) along the outline of the square. The military detention system was also abolished in the 1960s. In other cases, a soldier who disobeys the orders of his/her squad leader will be pressed to assume responsibility for their action, and then faces a ‘mutual verbal critique’ during the daily assembly.

The book, Would North Korean Soldiers Have Hardtacks? by Lee Jeong-yeon, a 38-year old ex-DPRK soldier, was written to give "a more accurate and objective information on the DPRK armed forces to the South Koreans," Lee said. The work highlights many of the details of North Korean military life.

For example, you are expected to call your fellow soldier ‘comrade’ rather than by name, which could seem to signify mutual respect, somewhat in contrast to South Korean culture, where soldiers address each other based on rank and on the fact that addressing others by name is considered rude in Korean culture. Vacations and visitation are very rare commodities. You get a 10-day vacation if your parents pass away, but whether you can actually take the leave depends on timing and luck. The rule says you can have visitors in the barracks, but the reality is that no parents or girlfriends can visit. Thus, most DPRK soldiers do not get to see their families, friends, or loved ones during their 10-year compulsory service, the book said.

So is this enough to convince anyone to sign up?