.is there any downside to doing online check in prior to arrival? is it less likely you will get you request accommodated?

On eight trips/ten resorts we've always gotten what we requested via online check-in. Every time we've been lucky.is there any downside to doing online check in prior to arrival? is it less likely you will get you request accommodated?
is there any downside to doing online check in prior to arrival? is it less likely you will get you request accommodated?
Sorry stupid I'm from the UK - what is the link for online check in and can I do it being outside of the U.S. & having booked via a travel agent?
Thanks for any info!!
You can do online check in as international guests (I did it a few weeks ago as a Canadian traveler) Online check in is accessed through mde but only on an iPad or a computer I couldn't see it on my phone within 60 days of arrival. You can make room requests and let them know what time you'll be arriving but you will have to go to the front desk to get your room assignment and magic bands.I'm coming from Canada & have to pick up our magic bands, is that done at the front desk check-in? I was planning on doing online check in but maybe that's not an option being an international guest? checking in at Pop Century if that makes a difference.
is there any downside to doing online check in prior to arrival? is it less likely you will get you request accommodated?