They definitely aren’t the cheapest option, that’s for sure. They do their job well, and they don’t leak at all with the standard lid. The wide opening is definitely a very nice feature, it does feel more like drinking from a traditional mug.
One thing to note, and I haven’t experienced this myself, is that some people have reported that the ceramic lining can absorb some unpleasant odors. Though I think that was just the early batches, and has since been fixed.