I have a ThermoHAWK 200 that I got for less than $30. I really like it. I use it frequently when prototyping circuits to check the temperature of various components, usually MOSFETs or power controllers.
These small keychain like units have a Distance-to-Spot ratio of 1:1, meaning if I want to measure the temp of something with an area of 1 inch diameter, the unit needs to be one inch away. So to measure a component temp it needs to be right next to the component.
The gun type units with a laser pointer have a distance-to-spot ratio of more like 12:1 so to measure the same 1 inch diameter area it can be 12 inches away. Thus the use of the laser pointer.
I’ve got one of these http://www.ebay.com/itm/200939188072 , no complaints and it seems fairly accurate, though if I were buying again I’d probably get one with adjustable Emissivity
I have one from fasttech https://www.fasttech.com/products/1326105. The temperatures I have checked it at are pretty accurate. The laser doesn’t quite point correctly but not too far off. It’s not a rifle after all.