I have several friends that have applied for a K1 and CR1(if you get married there)..Some of them were approved within the same time. Some people like to do the K1 cause the process moves a little quicker and per some of my friends those that filed a Cr1 moved faster...Even with doing a K1 there is no gurantee it will get approved...If they have kids with some one else that does not lessen there chance at all..Actually it makes it better for the kids cause they can file the kids as well at the same time and if they do not they have up until one year to do so...With doing a K1 they can not work right away and there is a possiblity that you will all will have to go through an entire interview all over again some couples do some do not. When friend did the K1 they had to go through an interview and they were asked about 80+ questions...If you decide to do the CR1 (get married there) once he has the interview and gets approved as soon as your spouse gets here he can get his social security and look for a job and start work...