I am looking at putting in a portable spa in my back yard and was wondering if anyone could share their experience with the Covana Oasis cover? About how much can I expect to pay for it? Can I install it myself? Does it insulate the spa better than a typical factory cover? Have you had any problems with it? What is customer support like - and are local dealers able to handle it? Would you buy it again? It's been difficult to find any reviews about it, any thoughts you have would be great. Thank you!