They are having prices almost half of directly booking. I will not need to modify or cancel (and if there is an emergency I do purchase separate trip insurance). Reviews seem skewed negative, but also I have found some on this forum (and others) that said things went smoothly. If I book direct I will have to change my trip to 8 days instead of 14, which I'd rather not do. I am looking to book with Vayama with Swiss Airlines and I called Swiss, and they didn't seem concerned about booking 3rd party.

Is this a huge mistake, or go with it and hope for the best (no flight cancellations/delays to cause issues)?