I needed a unit I could take around the property for portable power, electric jack hammer, radio, other corded tools etc. so I wouldn't need to string 100' extension cords.This fits the bill just fine. I made a cart for it which makes moving it easier. The only things that could be improved: where the 120v AC plug rests, it doesn't sit neatly in its designated place so the back of the unit is flush. That is nitpicky, I know, but, to be objective. Another "negative" is Lion's use of 24volt solar panels. This may be a negative for only me, because I have a bunch of 12 volt panels. I'll just put two of them in series. Not really a negative, but buyer be aware: Lion uses the 30a Anderson plug for their solar charging input. I believe the general public - ones not also buying Lion's 24 volt solar panels, would be better served with an MC4 input. MC4 connectors are on the majority of panels in the market. If you plan to use panels other than Lion's, you'll need to make an adapter plug. Also pretty nitpicky, huh? Otherwise, I could find no negatives.
I also bought two of the XPs. There is a similar cord issue with them also-difficult to wind the cord into their provided space in the back (again nitpicky), but otherwise; well packaged, received (I am in Utah) within 3 days of ordering, and they look perfect. Have only, so far, used to power a portable XM radio on the property and used a 1000w heater in the shop, just to test it out. Worked well, barely lowered the state of charge after 30 minutes of use.
Many of these equally sized units by other manufacturers are not LiPo4 powered and have significantly less charge cycles that the ME. Stay away from the Lithium-Ion (polymer) and the NMC batteries. LiPo4 have twice the charge/discharge (life expectancy) cycles. Double what your expected needs are and you should be happy. Also if you're looking to purchase a unit like this, look for one that is upgradeable; you can buy extra batteries, like the XP.One final note, the XP can be plugged into the ME when the ME goes dry, and the ME can continue to be used. I just wish the XP could be charged independently, but that would require a charge controller in the XP unit, and raise costs. Good unit and Lion's tech support responds quickly with the right answers..