Need Advice on Light Screwgun

[Grateful11]

My brother got this set from his daughter and her husband for Christmas, it's really nice and very light but not cheap:

Ultra compact driver-drill and impact driver offer best power-to-weight ratio
2-Speed Driver-Drill (0-350 / 0-1,300 RPM) delivers 200 in.lbs. of Max Torque in an ultra compact size of only 1.9 lbs.
Variable speed Impact Driver (0-2,400 RPM) provides 800 in.lbs. of Max Torque in an ultra compact design of only 2.0 lbs.
Makita Lithium-Ion battery and Energy Star rated charger produces 430% total lifetime work with 2.5X more cycles
3-year warranty on tools and 1-year warranty on batteries and charger

http://www.amazon.com/Makita-LCT203W-10-...22?ie=UTF8&s=hi&qid=1280516677&sr=1-22