I use lepros. They have been in the business a very long time so you can't go wrong. As far as other tips, they seem to be on the expensive end and I don't know how consistent they are. I've had guys put on tips and a few months later fall apart. What you should be careful with are the guys that think they know how to tip a cue but don't. I don't know how it should be done, which is something on my list to find out.
If you're missing because of mechanical errors, its ok. Tip error is a horrible way to miss because it takes a long time to develop a sense for what went wrong. It shouldn't even be a factor. Most of the hard work should be having a really good cue repair guy that has the ability to select a good tip, then putting it on right without screwing it up.
I notice guys with multiple shafts for the purpose of maintaining at least a few well groomed tips. It should be habit to always check your tips.
If you're missing because of mechanical errors, its ok. Tip error is a horrible way to miss because it takes a long time to develop a sense for what went wrong. It shouldn't even be a factor. Most of the hard work should be having a really good cue repair guy that has the ability to select a good tip, then putting it on right without screwing it up.
I notice guys with multiple shafts for the purpose of maintaining at least a few well groomed tips. It should be habit to always check your tips.