I owned a Maytag front loader for 7 years now and the Samsung front loader for over 2 years now
The Maytag does a wonderful job cleaning. The only problem I experienced was mold on the door seal. I started wiping the seal after each use and leaving the door open to make sure it dried out completely, and that helped.
The Samsung has the silver care that is supposed to be effective in killing bacteria (developed for the the space station). Samsung does not recommend using bleach or hot water when using the silver care option. I found my whites did not stay 'white' using the silver care so when I wash whites, I turn off that option, use hot water and bleach, and have been able to keep my whites bright.
Neither has given me any mechanical problems. I am currently using the Samsung with the Maytag in storage but will have both in my home when I finish building an extension.