The inability to easily change the time is a good thing IMO. I've rarely seen a Hilton clock off by more than five minutes, and I stay in a Hilton property almost every week and have for several years now. When I've been in some other hotels, I've had clocks that were so easy to change that just barely touching the hour or minute button on top of the clock when shutting off the alarm in the morning advanced the time and hour or several minutes. I've generally seen the time more off in hotels where guests could change it than I have in Hilton properties. Only once has the time been so far off (more than 10 minutes) at a Hilton property that I called to have them send someone up to fix it.