It depends on the price point of the home. It isn't what we want as much as it is what the prospective buyers expect. If the furnishings in the home don't fit the home, I have them removed. If we have a vacant resale home attempting to separate itself from the vacant short sales and foreclosures, then staging can make all the difference in helping buyers remember that every home has it's own story and you cannot just lump them all together and low-ball everybody.
I find I use staging services very rarely. Only a home or two a year in most years. An under-furnished home is better than an over-furnished one. Most times, it's a matter of us using what the owners already have. That may not be what you want to hear, as a Stager. The reality is that over time agents become fairly adept at listening to the feedback of the buyers and figuring out for themselves what will work online in photos and in person for showings.
Have a great day!