Need suggestions on Invisalign treatment!

Hi, I have space between my front teeth and crowding on the bottom row. I got braces off two years ago. And the dentist told me to wear retainers but I hardly wore it. So, the space between the teeth has increased. This is affecting my smile and thereby my confidence. I am planning to undergo orthodontic treatment at a clinic in Calgary. One of my friends suggested me this clinic. She had undergone teeth whitening treatment at this clinic. But before undergoing the treatment, I would like to know whether this Invisalign will work for me. Or I need braces again? I would like to undergo Invisalign aligners to fix my problem. I have heard about the peculiarities of this aligners. It won’t affect the eating, we can eat whatever we want. It is easy to remove and replace. Also, it is safe and easy to maintain. I would like to know the cost of this treatment. Also, I want to know the experience of others with this. If anybody who had undergone this treatment, please help me with your suggestions and replies.