My go-to platform but usability certainly can be improved
My preferred platform to accumulate miles. The usability has issues when one has many invoices to put through at one shot - a) in terms of downloading receipts (only one at a time) b) if there is an error, the previously input items need to be redone (and not 'saved in cart') c) need to key in all invoices again if using the one-off input method (not recurring) to avail oneself to the promo codes.