Received the Delta pro 2 unit in a timely manner. It was well packaged so no damage in shipping. Easy to set up and seems to function exactly as described. I may find that we will be lacking some capacity if we have extended power outage however that’s not a short coming of the product and can be rectified by adding an additional battery.
My old lead acid batteries are 4 years old and expect they will start to fail. I bought the delta 2 so I could transition to lithium batteries. So far it has been a very good and simple project. I like that it has it's own charge controller with a few different ways to charge. So far so good. Will probably buy the extra battery eventually.
The main reason I purchased the unit was to run my RV furnace during quiet hours while camping. So not to run my rRV house batteries down, I have been plugging the RV into the EcoFlow to run my appliances. In the meantime, I’ve been using it to charge tool batteries and things as useful as are phones and laptops. No problem changing the EcoFlow.