Tite has everything that you need: high quality equipment for his clients, more than 20 years of all-year experience in Caucasian mountains, enourmous patience in case if you know about alpinism from youtube, strong target orientation and clearly set limits about your responsibility while climbing.
I loved his approach for learning by doing, and I felt myself safe with Tite from Tbilisi to the top of Kazbegi and on the way back.
Just follow Tite step by step and you will be at the top of Kazbeg in 5 hours.
Good luck!