I'm a fan of stuff that does not break. In a world of throwaway electronics, Motorola radios are like bricks. Some of them are just as heavy too. As a ham radio operator, you can spend lots of money(like any hobby) outfitting yourself with expensive stuff.
Or you can be cheap, and recycle old surplus commercial gear as it comes availible. This frees up cash for food, clothing, electricity, worthless ebay purchases etc. I wonder how many of these radios hit the trash when cellphones took the place of dispatch radio. The GM300 was Motorola's affordable mobile radio, being under $1000 I think they were about $700 new.
So, what does it do? I use mine to talk through Ham repeaters all over New England. The radio is capable of 40 channels in the Vhf ham band. It requires a computer running DOS (remember that?) to reprogram the channels. This may be a limitation if you travel, since repeaters are programmed differently across the country. I use mine for a base
in the house with an antenna on the roof so I do not need to reprogram it often. The radio will get hot if I talk too much and will power down to cool off. It's trying to tell me something.. The audio quality is better than most Ham gear, and I used to repair these for a living. They have a modular chassis with interchangable boards. I know them inside out and I highly reccomend this unit.