I only stay at the Disney Springs Hotels and I never have a car. As much as I'd love to stay at a Disney resort, I simply can't justify the prices. I also love the fact that 6 of the 7 hotels have frequent guest programs that award points for every dollar spent. (The B Resort is the only hotel that doesn't have a frequent guest program.)
As long as you have appropriate expectations, you can have a great trip staying at the Disney Springs Hotels. Of the choices, my favorite is the DoubleTree Guest Suites because every room is a 540-square foot suite. That hotel is the furthest from Disney Springs. I'd say it's a 15-20 minute walk along the well-landscaped Hotel Plaza Blvd. From 6pm to 3am, there is a shuttle that runs between the seven hotels and Disney Springs.
The other hotel I recommend is the Holiday Inn Lake Buena Vista. That hotel is closer to Disney Springs by about 10 minutes. The staff there is wonderful.
I've spent roughly 40 nights at the Hilton Lake Buena Vista. On a good day, it's a very average hotel. Sadly, I've had many stays that have had problems. The Buena Vista Palace is currently under a property-wide renovation. The expected end date is October 2016...but I wouldn't be surprised if that date gets pushed back. I have not stayed at the Wyndham, Best Western, or B Resort.
Be sure to check for possible discounts on the Disney Springs Hotels marketing website:
http://disneyspringshotels.com/
As for transportation to the theme parks, there are pros and cons. The shuttle bus service is run by Mears Transportation. (That's the same company that runs Disney's Magical Express service.) Drivers are very friendly and the buses are quite punctual. Each bus serves 3 or 4 hotels. Fortunately, that's not as bad as it sounds because the hotels are literally adjacent to each other. In some cases, it only takes 1-2 minutes to get from one hotel to the next. Unlike Disney transportation, these buses operate on a schedule...every 30 minutes. It's great knowing that the bus will be leaving the hotel at a designated time. Pickup times at the parks are slightly less exact, as there might be traffic. But, buses never leave prior to the time listed.
The biggest downside is that each bus route goes to two theme parks. Usually, it's one bus for Magic Kingdom/Disney's Animal Kingdom and a second bus for Epcot/Disney's Hollywood Studios. If you are going to the second park, having to take the detour to the first park can be annoying.
The other annoyance is that the Magic Kingdom stop is actually at the Transportation and Ticket Center. That means you need to take another form of transportation (ferry, monorail, or bus) to get to the Magic Kingdom entrance.
Here are scans of the transportation information from a stay in May 2016. As far as I know, they are still accurate.
Feel free to ask any follow up questions.