Most people would say that one leak is too many, and that it's not if but rather when in terms of likelihood of leaking. You really have to think about your usage and plans, meaning that if this is something you'll keep for 15 years then it's better to get something that doesn't require maintenance because it will probably leak during that time. On the other hand if the plan is to keep it for a few years then perhaps you'll get lucky and whoever buys it from you and choose to roll the dice instead.
I also think there's a factor of role and twist that has to be considered. At that length it may be less and so you defer the leak, if you will.