Your decision on any supplier should be based on your research and discussions with them. Have a look across their social media and websites to read past reviews and testimonials. Make sure the images belong to them and are not just stock pictures that look good! A decent supplier will want to talk to you to find out your ideas, offer suggestions and may even provide references so you can speak to a couple they have worked with before. A meet up before any event is a must, and ask to sample the fizz/wine. If they create a good first impression on you, then they will likely do the same for your guests on the big day.