I might put this built-in in my master bath without the counter top and with built-in storage cabinets above. In a laundry room hampers in a vanity for sorting dry cleaning and laundry. I'm liking that! Also love the big counter.
Use Grundtal hooks (or these extra large, hand-forged hooks from Custom Citizen on Etsy) to hang your jeans — you'll save space, and putting them up will be that much easier. Space Saving IKEA Hacks for Small Closets