I use Kiwilaunch for several client projects, for massage therapists, website design, yoga studios, it works great for one-on-one sessions and for group classes. I have not used it for multiple therapists being able to login but I have used it for multiple therapists and I love that you can tailor the calendar to be embedded on the website or as a booking page. I also like the feature that we can title catalogs, for example I'll separate services by events or appointments. It works well.