Jeff, on the six channel receiver, the two aerials can be easily orientated to achieve the 90 degree preferred orientation.
The single aerial Rx is also very good and I have flown one to nearly out of sight range, but clearly does not have the signal security that the diversity receiver offers.
The twin aerial is as good as, if not better than any other diversity receiver, and for £17.45 proving very popular compared to what you will pay for a comparative Spektrum Rx.
Our experience with the LemonRx low power ground range tests is usually around 90-100 paces, a bit more than the 30 or so that is found with some systems.
Also with the DIY and Plug and Go modules that we sell from the UK, we do a no-cost firmware update to disable DSM2 if the customer prefers, also we have large stocks here, so next day delivery, no additional VAT/Duty on personal importation, discounts for multiple orders and local back up is part of our service we offer our UK/European customers .