RVUpgrades.com is running a drawing for a free one. The 709 model I think, that interfaces with the Aladdin System.
We had it installed in Gillette in 2013. The only caution I would advise, is make sure to get the strips long enough to go the entire height of your tanks. The guy who did ours in Gillette, didn't have the right size, so we compromised for a substantial break in price. Our tanks show zero until there's actually about 5 gallons in them, so we just add 5 gallons to every reading. When I dump, the gray water for example, the reading in the bay says zero before the clear fitting shows the flow has stopped. Not a big deal.
Other than that, we are extremely pleased with the system. It is plug and play in to your Aladdin module in the bay. Never any issue. Ever.