Bought a Bosch GLL2-80 last year when purchasing a home that had many projects built in. So far it has been a absolute pleasure to work with for the following projects:
Jacking the house to replace the undersized main beam with a steel H beam, support column, footings and sistering floor joists. Indispensable to throw a horizontal laser line and measure the amount the jacks where moving the ceiling/floor, setting the base of the beam pockets in the foundation wall, setting the new main beams (3 separate beam segments w/2 support columns), measuring floor sag for setting load bearing walls etc..
Redoing the kitchen: floor height measurements for self leveling concrete, chalk/laser line reference for truing walls, leveling cabinets, striking lines for can light installation etc..).
I have moved onto replacing the front yard dilapidated railroad tie retaining wall with a block retaining wall. The base block is most critical as it sets the position of all blocks on top of it. I started using a bubble level, torpedo for individual blocks and 4' bubble for seeing how the wall is trending. That idea was soon punted for the GLL2-80. Just have to measure from the top of a reference block to the laser for the arbitrary number and ensure all four corners of your next blocks are the same number. Much quicker and precise than working with a bubble level. Just have to pray for a cloudy day as using it in the bright sun is a PINA; been doing a lot of the work after work into the night time with a head lamp and its great to work with in the dusk/dark.
Replacing the front entrance deck follows and I know it would will play well there too.