My G5 scuttle arrived today and I gave it a try. First, here are a couple of pictures: I also have a Moss scuttle and since that is a popular scuttle also, here are some comparisons. I used a pyrex measuring cup for the measurments: Inside chamber - G5 holds 8oz of water, Moss holds 7oz of water. Outside chamber - G5 holds 6oz of water, Moss holds 12oz of water. Here are some pictures: I boiled water in my electric kettle and filled the G5 and the Moss. The ambient temperature in the room was 75 degrees. I measured the water temp with a Thermapen digital thermometer as it boiled and it read exactly 212. I kept the plug in the G5 except to test the temp. Here are the temperatures over a 12 minute period: After 3 min - G5 146 degrees, Moss 169 degrees After 6 min - G5 139 degrees, Moss 161 degrees After 9 min - G5 132 degrees, Moss 156 degrees After 12 min - G5 126 degrees, Moss 151 degrees Now, I'm no scientist so these are just my observations based on this one test. And I only tried it once. If anyone sees any flaws in what I did, I'm happy to try something else. My assumption is that because the exterior chamber of the Moss holds twice as much water, it remained hotter than the G5. The plug did not seem to make much difference in maintaining temperature. After the temperature test, I prepared the G5 the way I normally use the Moss to prepare some lather. I filled the exterior chamber with hot tap water and put the plug in and then filled the interior chamber with hot tap water and soaked my brush for 2 minutes. Then I emptied the interior chamber and shook out my brush. The brush was a Rooney 3/1 Super. I used TOBS Shaving Shop, which is a cream I have used before. Here is a picture: The G5 really performed well here. It is hard to tell from the pictures, but the interior chamber of the G5 is concave, kind of like a tea cup. The Moss has a flat bottom and vertical sides. The ridges in the G5 are also more pronounced then the Moss. The G5 was easier to build a lather with and it seemed like it created more lather with the same amount of cream than I normally get. There is a lip at the top of the G5 that did a nice job of keeping the lather from coming out the top. I imagine due to the concave shape, my brush seemed more comfortable in the G5 if I can put it that way. It splayed out more naturally and I believe that helped in creating the lather. So, sorry for being long winded but my conclusions are: If you want warm lather, the Moss does a better job. When I just used tap water, the lather was pretty cool in the G5 by the time I was done with 3 passes. If you want something that is easy to lather in, go for the G5. Bottom line for me is that I think they are both beautiful pieces and I will continue to use them both. Hope this helps.