Tools that I see to analyze deals: Zillow, rent websites, craigslist what other tools do you recommend?  

You can hire someone on Fiverr website and they'll add furniture and personal items to a blank photo for a very reasonable price.

For bookings, I recommend FF, Airbnb/VRBO (30+ day stays), Zillow, Facebook (can depend on the area), and websites like ALE solutions for insurance placements

Call the number on my website which you can find my googling FarFar Contractors in Cape Coral.  

One of our most popular websites is http://www.realestate.com.au/buyHere you can find information on different markets and look at property for sale.3.

I did a quick google search yesterday trying to find one in my area and got a lot of corporate type responses eg fill out this form and check the website etc.

But you can look up vacancy rates on websites like rentcafe or rentometer.  

Have they delivered on their promises, or have the results been underwhelming?

Just looking at their website,  there is no useful or helpful information that a sophisticated investor would normally require (to even give them a chance of being considered).

Quote from @Jonathan Soto: great write up. thank you for taking your time and going in to detail. i have been looking into a business for myself but havent seen much in biz bysell that make sense. just need to keep searching Try looking into Crexi and Loopnet too, I find all different kinds of small businesses for sale on those websites compared to Bizbuysell.