I had a mechanical put in 8 weeks ago. I chose it because I have already had 3 surgeries and don't like them. Given an opportunity to avoid a big one in the future, I took it.
Warfarin is no problem to me. I have a St. Jude which has a recommended INR range of 2-3, but 2-2.5 is what is optimum per my doctors. I also have hemrhoids and have had about 3 since the surgery. They healed quickly (1 day) with over the counter medication and were no worse than before warfarin. I also eat a lot of greens in this spring season, lettuce, asparagus, bok choy, spinach, etc. I am not worried, my surgeon and cardiologist said that for my type of valve (St. Jude) if I go a little less than 2, it's not a problem. For me, the biggest negative with warfarin is having to spend the 1 hour for the blood test ever week or so, but I am going the home testing route soon.