I've seen worse, but at least Yumi's not bad at A cup. Boobs are boobs, as long as they're are resting on women's chest. Simply put, not many places out there you could get early 20's as marketed at that price point.
I've been to SP shops in RH. Kept saying they're young with okay looks, takes your money and wanted you out in 10 minutes or less on a lousy service and crappy attitude. As if they're one of beautiful girls in the business.
I go with service over appearance all the time. Yumi is nowhere near there yet. But, as a hobbyist...Damn...Take the lead and enjoy.