Used turbo tax once many years ago when it first came out, but did not feel at that time it was worth the money as it was not very user friendly. That has improved greatly. Walks you through from beginning to end. I run a MAC OS 10.9.2. I had a number of (frustrating) software problems such as not being able to update program (required) to get all available forms, etc. Also at the very end, my first couple attempts to e-file were denied due to "not having all available updates" even though I had finally updated shortly before and no other updates were available. All of these update problems were resolved by closing out program/restarting computer many times throughout the process. Taxes are done/filed....All OK now.
Even though I have used TurboTax for years (including back to when it was Parsons) I like to have it take me completely through each and every section to make sure that I don't miss something in addition to continuing changes in the tax code(s).