public function getPriceDescription()
 {
     $product = new Cart66Product();
     $spreedlyProduct = $product->getOne("where spreedly_subscription_id = {$this->id}");
     if (!empty($spreedlyProduct->priceDescription)) {
         $out = $spreedlyProduct->priceDescription;
     } else {
         $price = $this->price;
         $out = Cart66Common::currency($price) . ' / ' . $this->terms;
         if ($this->hasFreeTrial()) {
             $duration = $this->chargeLaterDurationQuantity . ' ' . $this->chargeLaterDurationUnits;
             $out .= " <span class='Cart66FreePeriod'>(first {$duration} free)</span>";
         }
     }
     return $out;
 }