Yes, the Whole House FM transmitter is excellent! I researched customer reviews on-line before I bought it. I bought a Crane several years ago, but sent it back because it did not have enough range or a clear enough signal. Then I used one for several years (with Sky Angel satellite service) that is made from a kit (got it from Hobbytron.com). Two years ago, that one failed and I bought the Whole House FM transmitter. It's really good, gives me a crystal clear signal throughout the house, yard, and garage. A bonus with the WH transmitter is that it comes with adapters that allow you to use it in alternate ways (in the car, connected to your computer, etc.).
You plug the FM transmitter into the back of your Sky Angel box (or TIVO box used with SA, in my case), then you look for a frequency that is quiet on your FM radio within the range the transmitter uses (it is a range on the high end of the FM band). Once you locate that, you simply set the frequency to match on the radio and the transmitter, and you are good to go. I have a radio in virtually every room of my house, including bathrooms. All I had to do for the radios was tune them to the same frequency. Then I can simply turn the radio on, and whatever audio is playing on Sky Angel plays through the radio. Sweet! One of my radios does not have a digital tuner, so I leave it on the FM transmitter frequency all the time.
You do not have to get an RF extender or extra remotes to listen to the radio throughout your house. You need them only if you want to be able to turn the Sky Angel box on/off and tune stations from another room. I bought a Next Generation extender from Amazon.com and two extra remotes from Sky Angel. (One stays on my bed stand, the other can "travel" with me around the house.) These things do add a one-time expense, but it's worth it. I think I use Sky Angel at least ten times as much as I did when I was able to watch/listen in only one room. I can reach for a remote, turn the Sky Angel box on, then tune to a radio or TV station in the middle of the night without getting out of bed. (I rely on those little beep sounds so I know where I am.)
Google "Next Generation remote extender" to get customer reviews and purchase info. I also called the company when I needed some help later (Next Generation: 1-866-834-9400 – Bob). Bob was very helpful.
A tip with the FM transmitter. I set the Sky Angel volume at the level that gives me the best signal on my radios (for me that is 90), then I never change the volume on the Sky Angel box; I adjust volume only on the TV or radio.
Hope this info helps!