
If your getting insurance I'd always advise a lifetime policy as this will then cover on going problems each year up to your claim amount as long as you have the policy. My policy I get £4000 per condition per year so this means now I have claimed for incontinence for my girl her meds will be covered each year up to that amount for every year I have the policy.
Other types of policy include max benefit which is where you have a set amount you can claim, once you hit that limit you can't claim again. Seems normally two limits one per condition and one bigger total claims. So for example if I had that for my girl once her meds reached the max claim limit I'd then not be able to claim for them anymore and would then have to buy them myself.
Also Time limited, this is where u can can claim for a condition only for a set time period. So again using my girl as an example if I had this and say the limit was a year I'd be able to claim her meds for one year than after that couldn't claim for it again.
Lifetime polices do cost more than max benefit and time limited ones as they cover your dog for longer when it comes to reacouring conditions but in my opinion it's worth the extra cost.
I know some people have had issues with them but my two are with animal friends and I have found them good enough when I've made my two claims.