This 'laptop-size' drum machine inspired me from the very begining. The sounds are great, deep and if you use Distrotion - dirty. But always the sound is well controlled so when you experiment with maximum values of the knobs - it's still great. Sequencer is simple, logic but also very deep and effective. Especially with Swing, Random or Step Repeat use.
Before I have used Volca Beats, that I loved but found some limits.
With Impact it seems for me even more music styles are possibles to explore even though Impact is a strong position for any electronic, edm or hiphop styles.
Pros: Analog Sounds (Kick Decay ...), Color function (change a little bit main sound of the pad), Distortion, Interface and Hardware quality, logic sequencer with 64 pattern, additional FM Drum, Computer application for configure/upgrade HW and import/export patterns, multiple connections. Good sync options with other HW/Daw.
Cons: Maybe one - Not all instruments are equipped with 3 knobs for more sound modify but two only, but well you can always trigger two instruments on same time to get more rich, combined sound.