I've had a PLS 2 E* laser level for years now and generally been very happy with its performance.
There was a plain PLS 2 version which as far as I know didn't have the pulse mode which allowed the detector to be used, I went for the PLS 2E
which stands for External specifacally because I could use a detector with it.
Being the E version I bought it with the laser detector so it can be used outside even in bright sunlight where I can't see the laser line.
Just fasten the detector onto a bit of 2x1 or a spirit level and listen for the beeps.
I've never been keen on tripods with laser levels cos as soon as someone knocks the tripod/walks past on the wooden floor its on and it slips slightly or looks at them funny they can move enough to alter the height of the laser.
The PLS 2E came with a fancy little angle bracket with two holes so it can be screwed to a wall and its also got two strong magnets so I can just stick it onto a steel girder even a steel plaster anglebead at a pinch. Its on the wall so doesn't need a floor (sometimes the very thing I'm putting down is the floor) and the laser self levels as long as its within about 6 degrees.
Its been an absolutely brilliant tool, my only gripe being that it runs in AA batteries, which sometimes leak, with expensive results.
Well, guess what happened to mine after I forgot to remove the batteries when leaving it for an extended period...
Anyway, after my batteries leaked and ruined the PLS 2E so after an extended period of umming and ahhing I finally cracked and bought the uprated version which is the PLS 180. Pretty much the same with better beam spread.
Some Youtube bumf about them.
I bought the version without the detector but it has the pulse mode so can be uprated but I'm very pleased to report that my old detector (from the PLS 2E kit) works with my brand spanking new PLS 180.
I've also changed to Eneloop rechargeable AA batteries (supposedly less prone to leaking and can be recharged many many times) and don't store them in the expensive level anymore.
Now on the promo vid it says you can basically chuck your bubble levels away which I would say is stretching it a lot, I still have an 1800mm casing level and a 600mm head level as I'm just not using a laser level for fitting door casings, its just not accurate enough for me.
It is great for many many other jobs on site and saves a huge amount of time and effort.