If its a professional repair, the performance wont be effected at all.
Is it worth it ? Jury is out.
An old 380 that needed TLC and had 20 or 30 patches sold on Ebay last month for £440.
If you are happy with the boat and want to keep it, get the work done, its a lot cheaper than a new Aerotec (Currently on sale at £1995).
If you dont want it, stick it on Ebay with an honest description and pictures, it should sell for £2-300.