Avoid them for your important events, unless you want it to be messed up. We unfortunately used prop gallery for our wedding without actually reading reviews here. They missed on installing entire backdrop for our reception and did not provide the wedding backdrop as we were promised and as was drafted in contract. My wife left voice message the next day asking for why the backdrop wasn't installed, but they never replied to her. I sent a feedback email to them (specifically Greg Olsen) about the things they missed in decoration from the contract but again no response. I wanted to give them a chance to get back with some explaination before I posted the review online, but I guess they don't care enough to reply back as well.
Very prompt in deducting the money from your credit card as per contract but not prompt in service. Having said that for me it isn't much about money rather than running an ethical business. Also weddings are once in a life time events and you don't want that to be messed up like this.
Not sure how they are in business.