Sex141 is reliable as far as rates go. But agents do bait and switch. Look out for reliable ones like TR, HG, DK, LG.
IMO the honey girls are the way to go. This is the same as an outcall, typically in a 4-star hotel. Tsim Sha Tsui is a good place to be located because the vast majority of girls are based there.
Most girls offer a GFE—don't expect PSE style rimming or other services. That said most of the girls are young, probably under 25, and hot. Services are pretty standard but are usually delivered with enthusiasm and professionalism. Don't expect Romanian style clock watching.
Another good option are the massage places with full service. I have only been to one, Nuru Spa, which is highly reviewed. Get in touch via WhatsApp or WeChat and ask for pics of the girl on duty that day. It's a small place so only girl at any one time. This gets changed every week or two.
I've had two girls there, both extremely hot—hotter than most of the 'honey girls' I've seen. The service is impeccable. Assisted shower, followed by a proper dry massage, and then a nuru massage with proper nuru gel and an air mattress. Then avail yourself of a "sex chair" that's designed for various creative positions, the air mattress, or the massage table. It's £160 for 90 minutes. Well worth it, in my opinion.
Enjoy.