The products are very good but after delivery of the product , they promise for installation in 2 days . But when the two days are complete they cange , some of them don't respond us properly and only few of them are good . After they say that the technicians are ready , they do not come and when we call them they always say that "it is not possble today, so we will send them to you tomorrow morningor day after tomorrow ". So my advise is that after delivery if the technicians do not come in 2 days , call your or bring your own technician for the installment .