http://www.donrowe.com/Power-Bright-PW3500-12-p/pw3500-12.htmIt is modified sine wave so don't run your roof air conditioner on it. It may, or may not "eat" your microwave--but they are inexpensive.
Do NOT use it to power a Mac (Apple) computer.
Do NOT use it to power a heating blanket.
Charging a cordless drill or similar item may be a problem, depending on the particular maker.
I'd get a DC to DC converter for any laptop and avoid the overhead of running the inverter.
When it fails throw it away. Keep the wattage as low as you can. Use thicker wire than recommended and a catastrophic failure fuse at the battery post. 350 amps would be my choice for the fuse with wire designed for that much load.
The owner's manual has at least one error. It suggests a 2000 watt item would represent a 100 amp load @ 12 volts. The correct answer may be around 200 amps. I hope you have a largish battery bank.
This is not the unit I would have chosen. In my opinion you have down graded by going away from the Go Power unit. I hope I'm wrong.