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.
The slide lid is really nice, it keeps almost the same heat retention as the standard lid.
Somehow, I’ve justified a lot of Fellow products to myself haha, they are all very well designed and look so good on my counter.