We have an opal w/the side dispenser. Had it about 2 years with no issues but it isn't used often. Just small parties w/only 4 - 6 people total for some drinks.
My experience if you're buying it to make cocktails, you're better off getting a bag or two of sonic ice and keeping in a cooler. The opal doesn't churn out fast enough to make drink after drink for more than 3 or 4 people. Particularly if you're doing something like tiki drinks where you mix w/ice then strain into a glass w/ice.
If you want it as your daily ice maker it is probably ok if you don't go through ice like crazy.
Staff - take out the trash.