Its very convenient and clean for a mid season scrub.
On your way somewhere just stop, no need to change fenders or ropes.
they throw everything you need and you are up.
they scrub off and clean props.
you can go down a ladder if you like (I changed hull anodes)
then you leave within an hour and back on your way.
crew are happy on board for an hour, full facilities available ex shore power, they can sunbath on the flybridge if they like.
No oily boot marks
no strop marks
no filthy silt / weed dropped off the crane
Not suggesting its an alternative to a lift out and chock off for a month but sealift has its place