I ordered a set of leakproof period panties. I am also a customer of Thinx so had something to compare to but wanted to try a Canadian brand. At first glance, they seemed a little cheap looking. However, I quickly changed my mind when I put them on. They are super comfortable and really are seamless. I've never been one to wear these kinds of underwear to work (just in case) but I have started wearing the Knix ones.
As for customer service, I have had a great experience. I was missing an item in my order and they quickly resolved the issue and offered me a great solution. Couldn't be happier with the result.
Overall - I would recommend trying these for all women. The sizes do stretch so the fit will adjust. Personally I had no issues, but I do see a lot of complaints about it.
Bottom Line: Yes, I would recommend this to a friend