Many window tinting company's are tied contractually to a particular film manufacturer/ distributor. This may be an advantage for the window tinting company at the expense of their customers. IE Paying too much or not getting access to some of the latest film technology.
After many years installing window film I am aware of the limitations of some product and take great care in recommending the right film to achieve the clients objectives, whilst being conscious of glass safety and durability.
In doing my own installations, I am very aware that if I am not happy with a job then it is quite possible the client will not be happy either.
An old saying: you are only as good as your last job, don't let that one let you down.
Many clients know what they want to achieve, but not necessarily the best and most cost effective way to reach that conclusion.
Straight talking and honest advise are paramount in clients making informed decisions.