If you're never worn clogs before you've probably asked yourself the question, 'are clogs comfy?' or 'do I need to wear clogs in?', I certainly did when I bought my first pair and I'm so glad I did because now I'm hooked!
Generally speaking clogs are easy to look after; like all shoes they will experience wear and tear (otherwise, what are you doing with your life?!) but the advantage of the wooden heel is that small spots or marks can be removed with very fine sandpaper. Wooden heels can also be treated with olive oil to keep them more resistant to water.
If you damage the wood, small chips and splinters can be repaired with a little wood glue. If you see a small hole in the heel, don't worry - this is just a byproduct of the manufacture where a nail is used to attach the shoe to the last.
The rubber sole may become loose with frequent wear. You can have this repaired at your local cobbler, but please don't use your clogs without the rubber sole, or you will damage the wood.
You can clean the leather straps using leather balsam with a dry cloth (though don't use the balsam on treated leather or oiled nubuck). Untreated leather will darken over time - if you want to speed this process up, you can rub them with olive oil or leave them in the sun (or both!).
The leather will stretch naturally over time, so you may want to use your clogs indoors with socks when they're new to wear them in, especially if they feel a bit tight at first. Try to avoid wearing your clogs in the rain if you can - this can make the leather stretch too much. For this reason it's also best to keep away from wet grass (so watch that garden sprinkler in the summer!). If you do accidentally get water on the leather, make sure it dries naturally before wearing the shoes again.
The leather may stain other surfaces if it's wet, especially in darker colours. Nubuck may stain ligher coloured fabrics too, so choose your socks wisely - and in answer to the original question, yes, they are really comfortable!