I treated myself to the Koi Dylan (no longer sold) and I have to say it's a great bag. It fits my work laptop with ease, along with enough space for my essentials but not so much space that I overload it and it becomes two heavy.
Inside top pocket at the back which nicely holds my purse and work pass to keep safe and easily accessible. Plus a front zipped pocket with I keep my diary and keys in. Adjustable straps to get the right set up for each individual.
Loved it so much I hunted out two more on Vinted (scored an amazing bright yellow one and a Chester check one) have washed both of those on a gentle wash in the machine and they've been fine.
Safe to say I'm obsessed and will be keeping an eye out for more fun design to treat myself to in the future.