Excellent quality inverter. I have the pico glf version. Zero issues. Fast switch times, 1/10,000 of a second. Has been running for 3 years now. 5.3 kilowatt system. Runs our entire house. Several window AC's, deep freezer, 26 cubic foot refrigerator, etc. We call it the blue monster. Excellent battery charger as well. It runs 8, Trojan L16RE-B 6v Batteries. We leave it on 15 amp charge rate if needed. Does a way better job slow charging the bank instead of slamming higher amps in it. Excellent tech support if needed.

Since installing February 8, 2016 it worked perfectly until 3 days ago. It has stopped charging and is staying in shore power mode during early morning hours. The only way to get it to cycle properly is to cut shore power off briefly and then back on. It will begin charging when the battery gets low again but then repeat itself during the night again by not charging or inverting. Waiting on Tech Support's reply.
It seems to be a quality inverter with fast switching time. It runs fridge, microwave, two coffee pots, TV, and all lights all at the same time.
Update: Tech Support very quick. My ac power may be a little out of spec causing charger not to function correctly. I changed dip switch setting and will see how unit works.
Update 03-01-2016: DIP switch setting made no difference.
Update 03-04-2016: No response from Tech Support as of 03-18-2016
Update 04-20-2016: Still no response from Tech. I figured out charging problem. Battery temp sensor was preventing charging due to my not checking battery levels often enough. The battery closest to inverter, which has the temp sensor on it, was extremely low causing battery to heat up. I have eight 12v batteries and they need topped off every two weeks. The inverter occasionally will not switch back to invert mode. I can kill the ac input and it will immediately go to invert and may go for days without acting up again. I still like it as I originally wasn't looking for one with transfer switch anyway.
Update 07-14-2016: Gave up on hearing from tech support concerning problems back in March 2016. Lightning struck today and unit no longer works. Notified Tech Support on this new problem. Will wait and see. Wanted to have a standby unit for backup and still thinking about this same model but I might wait on reply before ordering a second one.
Update 07-14-2016: Tech Support said warranty will cover repairs but I would have to pay for shipping it back. I also purchased the same unit as a replacement/backup.
Update 07-19-2016: Replacement received but was damaged. Fan was completely broken loose with parts sliding around inside. Ordered another unit and it came in with same damage on fan. UPS driver said these type of shipments should be done by a freight service. Waiting on third unit to come in.
Update 08-06-2016: Received repaired unit from AIMS and it works great. This unit was shipped with FedEx and the condition of the box was terrible. The driver said it had many stops and handling on the way. The box was not packed inside an outer box as Amazon does but at least it works.
Update 05-16-2017: Still working fine. Used almost every day depending on weather.

So far it's doing everything and more I thought it would.