Studies indicate no long term loss of efficacy. You can Google the studies.
For me it helps avoid any Ed, lowers my blood pressure , and helps with workouts.
If you need a bigger boost for erections vcab always take an extra 5 mg on Friday. 
If I wasn’t taking Cialis I would probably be on a blood pressure medication. Cardiologist told me to keep taking it. If pressure rises will prescribe a standard BP medication.
One of the only bad things I read about it is a possible side of increasing change of skin cancer.
Here is a thread that I created recently. I am the OP even though it says “anon102”