After replacing all my incandescent/halogen bulbs with LEDs, I am VERY satisfied with the results. I have only had a two bulbs fail, versus over 100 incandescent bulbs/several blown dimmers.
Not everything is perfect in LED land though. The PAR30/PAR38 bulbs that I got have about a half second delay before they come on. The light switches in my house tend to be grouped in large panels of like 20 switches. After 10 years, I still wind up switching switches on and off until I hit the right one. That half second delay is a tad annoying.
LED bulbs (at least the downlights) produce a rather more defined light that incandescents. The shadows that they cast can be more distinct. Not a real problem, especially if you have proper coverage of fixtures. I can't say much about LED replacements for normal globe type bulbs. All the main bulbs in my house are recessed downlights.
You have to be mindful of your dimmers. Many dimmers barf at the low loads produced by LED bulbs and can cause flickering, buzzing, flashing, pukeing. I think this is why that Ebay seller has a nice supply of returned LED bulbs. All the dimmers in my house are Lutron Diva's. They seem to be the gold standard for LED bulb compatibility. Even with the Lutrons, dont expect to be able to dim to 0. I can dim my bulbs to around 20% output (that most people perceive as around 50%)
LED lights burn much cooler. My hottest LED bulbs run around 75C, halogens can run 800C! They don't burn off cobwebs or discourage insects like incandescents. Actually, cobwebs are good for you! They are great at trapping scuzz and filtering the air.
Avoid Chinese bulbs. I have yet to see one that meets its published specs. The cheap ones are VERY bad. Poor color (I hope you like puke green overtones and funky fringes), poor quality, buzzy, just plain poor. I really like the bulbs by Lighting Science Group (aka Definity, Sylvania, Ecosmart). I've found nothing cheap/sleazy about them.
I wound up replacing those Chinese PAR20's in my kitchen/office with some KILLER Sylvania bulbs (10 watt, 550 lumens (more than a halogen!), 95CRI) that cost 40 bucks a pop... and damn well worth it.