My 10 year old is still loving his bed. He’s had it since he was 3.

If you have enough ceiling height for a taller loft bed, I'd get that for a 7 yo. I have the Kura for my 4yo, but the lower area is low. It is sturdy-but your ds is older and might like to have a regular desk or dresser under the bed, which the Kura is too low for.