I hated the Mako in the 1st game and actually prefer the planet scanning in 2 to it. A lot of time wasted driving around and occasionally getting your ass handed to you by a thresher maw.
The combat compared to the next 2 does feel a bit clunky, but the story and character building are what makes this gold. Stick with it, talk to all of your crew in between missions on the Normandy and do all the side missions. Also, when it comes to a certain choice it should be obvious what do do! Also remember to have a particular romance partner in mind, depending who you choose it can lead to some funny cut scenes.
I finished it recently with MaleShep, full paragon. Started almost immediately after as FemShep for a full on renegade playthrough but I need to give it a few months before I tackle it, just not enough time in between for me.