Duracell DPP-300EP Review

I bought this item a few weeks ago after reading lot of its reviews. So far I have not had a chance to use any of its features. However I think I will when winter comes to jumpstart my SUV. It is compact and light. It can be stored easily in your car or truck. I charged it once at arrival (+/- 4 weeks ago) and the charge still holds until today. The compressor is very loud. I give it a 4 stars now since I do not know how reliable it is when I need it.