The worst thing about the B100R is that they are heavy. Don't expect it to go extremely loud. Sometimes the cardboard port tubes fall off. Some of them make a "pop" sound when you turn the power switch off. It's normal, don't worry about it. I think the vital electronic devices aside from standard resistors, capacitors, diodes, switches etc, that make it work are not obsolete yet, so they should be repairable if something goes wrong. They were made in the USA for a while, and then they were made in China. I have one of each, and don't think there is any difference.
The good thing about them is that they sound really good for a low cost solid state combo amp. There are a few TB members who like me own two of them. That should say something about what owners think about them.
Where I live, they go for about $300.00.
I think if you buy it, you will like it.