Through 1/2 the Navy Exchange[mynavyexchange.com] is offering $10 off orders of $10 or more with code WEBELIEVE. Free shipping is available when using the Military Star Card, on ship to store orders or on orders over $49.95. Otherwise, standard ground shipping is $4.95.
Full coupon terms and conditions: Valid on regular, sale and clearance merchandise. Not valid on existing layaways, previous purchases, price adjustments, WOW! Deals, Nex Below Deck Merchandise, uniforms, gasoline, gift cards, prepaid cards, Apple Care, Guardsman plans, Home Delivery, Keep It New, concession merchandise, consignment cookware (Eurocast and Twin Towers Trading), Rolex watches, Smart & fitness watches, Pandora jewelry, tobacco or alcohol. May be used with Military Star Card offers and manufacturer coupons. Coupon limited to one time use per customer. Cannot be combined with other NEX discounts cards or coupons. Limit one discount per purchase. No Cash Value. Nontransferable. Return value will reduce value of total purchase. Valid December 26, 2018 - January 2, 2019 online only at myNavyExchange.com. Not valid in store.
None of the robot vacuums out there are perfect. However, I think that Neato's mapping and the interface are superior. The D7 is pretty much the top of the line on the market right now. Hope this helps.