I have ordered both K tips which were great and I left a great review but I switched to I tips for the fact they last longer in time or usage and I’m not happy with them. They tend to slip more and fall out. Yes I had them professionally installed which cost about $500 - $100 per pack. Plus the extensions cost $800. They were installed with Bellami beads and correctly put still slipped a lot in a short time which was about 3-4 days and lost 3 already. Plus the extensions seems to be thinner then the ktip itself. Kinda disappointed and may go back to k tips but the coat is getting a bit much.