Hi! I think the biggest worry you will have with the situation is handling it as an owner. It is really scary to see your dog out of control or having a seizure, and even scarier when you don't know what to do. However, as an owner you need to stay strong, calm, and handle these situations with care. Most dogs to great with lifetime use of phenobarbital or other long-acting anti-seizure drugs to control the seizures, as long as you do regular bloodwork to adjust the dose and check the liver for any damage.
The biggest worries will come when phenobarbital at safe levels cannot control the seizuring, you will likely need further diagnostic imaging to see if something like a brain tumor is causing problems, but that step is a rare scenario.
If you can, keep a watchful eye out for anything that might seem to continually trigger the seizures, a smell, a treat, etc. Another possibility (which can be ruled out by the bloodwork they are doing) is toxicity, or electrolyte imbalance, and hypoglycemic shock.
As scary as seizure scenarios are for everybody, vets included, your dog will live a perfectly healthy and happy life, and will just require some extra TLC and close monitoring. If you are willing to go this extra mile and make the extra trips to the vet and pharmacy, you and your dog will be happy.
If you ever have any questions about the seizures feel free to PM me. I suggest reading Mia's seizure article that is stickied, it's a little technical but has some great information.