The bottom line up front for me: I wish it existed when I started brewing and I could have skipped all the various parts that add up to a higher price, plus made the process much simpler.
I just finished my 3rd brew with mine and I really like it. The cons are: no 10 gallon batch version, 120V in the US, slow wort chiller. The time to mash is fairly quick but it does take a while to get from mash to boil. Pros: consistency, simplicity, small form factor, temperature control. I will probably buy another to get back to 10 gallon batches, and the cost of two is less than the others I looked at: all the way up through the Blichmann and Spiedel models.
It does not speed up the process, but does allow me to multi-task in between steps and I can leave it until the next step.
Ideally I'd like a 240V larger model that does 10 gallon batches, but as I said the price is right to buy two.