Hi I have seem great results from my Colleagues as well as myself . With Spa Henna and Ellebana . Ellebana has great education. Once you understand the theory behind the workings of henna and contraindications and who is the best candidates possibilities are endless.

Brow lamination is fairly new. Each company might have a little different spin or marketing avenue, but basically the same . There is an on line class for brow lamination called keratin lash infusion they have had great reviews . One advice that I can give you is who ever you are thinking about training with ask if you could contact a student that uses their product or has been trained by them. 

Hi.  

This is a 2 part answer.  It really comes down to what lash and brow brands offer Henna as from my knowledge, there aren't as many henna as there are tints.  Colleagues of mine like Elibana for the Henna. Refectocil and ILash Hero (a new brand out of London) work well for brow lamination. Many of the formulas on the market for lash lift work the same way for the brow lamination service.  Ir really does come down with your technique during the lamination as there is an art to doing it.  Like with any new service on the market, it will be evolving and we all will be learning new tricks as time goes on.  There are companies now starting to offer training in July and August, so I would do your research and give it a bit more time so all of the kinks are worked out before you invest in a brand.