It depends on what you want to do with your information after UFT. First, you must use GEDCOM to transfer your data to Legacy. This will result in lost of data from the detail fields and maybe others I have not checked. This isn't a Legacy problem but the fact that UFT does not export detail fields in GEDCOM 5.5. I posted a message on the Legacy board to ask if they would take a look at UFT's Event Gedcom. The only response I got was from a user stating to the effect working on transfering UFT data would take away time from work on 3.0 problems.
After being a UFT user for some time you should have used the role sentence for events other than BMDB. Legacy does let the user use and name other events, but gives you no control of the event sentence as does UFT and TMG. In what we call the Family Journal these extra events are just listed as facts after the basics vital sentences are given. IMOH this would be to much to clean up later.
Legacy does have some nice features, like how it handles a nickname and others. Also the way one user can be a master and others a slave when a group of researchers are working on the same lines.
Of course everyone should d/l the limited demo and give it a try. You can only enter a limited number of people but any size of GEDCOM.