Never had any problems

I use Vistaprint for my beauty business and have done for many years, I have never had any problems. Everything I order comes as it looks on there site, when I have designed it and within the delivery time.
I also use their website builder inwhich I get alot of good comments about also I have managed to get myself on first page of google even to the top I still am, this is thanks to paying a little extra for SEO also regular updating. It is very easy to use. I have ordered large posters, business cards, brochures and promotional cards.
I also did a personal order which was a photo book which came exactly how I designed it.
If you are a small business starting up or even building a bigger customer base I would recommend using the vistaprint website pay for the extras as it helps alot. I pay £20.42 a month which is better than 1000's which other companies charge. You can upload pictures from their site and use your on with your own logo if you have one inwhich you can then very easily use them on cards etc. Also you can link any work you have done on to facebook and twitter which saves alot of time. Time is definatly something you don't get when you have a business until years later. I didn't know much about computers and websites before I used it but I just played about with it and got use to it quickly. If your a hairdresser, beautician, cake maker florist etc give it ago if you don't have alot of money, ideal for trades men too. Good luck