The album was released at a time when the group was in a decline as they grew and started to lose their child "cuteness". Also times changed in the music industry and bubble gum soul didn't sell that well any more, while the funk/disco era kicked in. So this album is the group's first attempt to go into that new direction. And actually it's a very good attempt.
The Jackson brothers were still under the Motown label, so the songs were still written by Motown songwriters and the brothers still did not have creative control, but there are some gems there.
There's some "experimental" stuff, such as Hum Along and Dance and Mama I Gotta Brand New Thing Don't Say No, but I can understand if some people feel these tracks are too long (more than 8 and 7 minutes long respectively).
My favoite songs on the album are: Get It Together, Dancing Machine, You Need Love Like I Do (Don't You) and It's Too Late to Change the Time. Dancing Machine is of course a classic and it was first released on this album, although it was the remix version that was released a year later on the Dancing Machine album that went #2 on the Billboard Pop Charts.
Michael was 15 years old at the time of this album and I love his vocals on this album. He doesn't have his small kid voice any more but it's not yet his fully adult voice. But it already has that MJ-like smoothness and warmth in it that he had as an adult. (I personally prefer this voice to his voice on earlier Jackson 5 albums.)