Waterproofing leakage and seepgae

Salaam brothers, i want to share a company, and i have a question that, is this company works well or not, and what about the guarantee of their work, because there are many companies in pakistan who are providing guarantee, anyone have faced same issues any experience what is the best solution for waterproofing 2 2k sqft roof and a 1k sqft roof.

Go with them or

Any other suggestion?

Universal Services company name

website link is https://www.heatproofing.pk