I remove the FEL every 2 weeks or so to cut the grass, then put it back on to move logs/dirt/rock/other.
The whole FEL is easy to get on/off if you're on a fairly stable & repeatable surface, using a cart requires more finesse but works. Have the manual with you and follow the procedure step by step and it's quick and easy. Have shop rags or paper towel handy, and preferably rubber gloves, because the 4 OEM couplings will lose about 1/8 teaspoon oil each and it gets messy quick.
What is not so quick nor easy is pin-on attachments. On the BX pin-on is much lighter than using a quick-connect system and the BX doesn't lift much to begin with. Stable & repeatable is key: if the FEL and tractor aren't in "the exact same position" you're going to have to force one or the other into that position. I made a rolling cart out of casters and 2"x3" boards for the bucket, it makes things really convenient, however the surface I line up with the bucket/grapple is on a slope and not repeatable, so it's more work.
But the FEL is relatively easy, just go slow. Slow is smooth, smooth is fast.