As time management games go this one isn't too difficult. I managed to complete every level on gold without replaying any levels. I don't consider this a negative as it makes for a fun, rather than frustrating, gaming experience. Some hardcore TM fans might find it too easy.
The storyline is quite good, and the graphics are also good - but the music is annoying. This is usually the case in TM games, I find it's best just to mute it.
This game took me about 3 and a half (maybe 4) hours in total to complete - so not a lengthy game, but for the Daily Deal price it's definitely worth it. I'd suggest you buy it today while it's on offer.