Yeah, I've not had experience with the newer ones... the ones I have are all versions with YiHi boards, which is probably why I've not had any issues with them. The only real complaint I have with my Sigelei boxes are they are just TOO boxy, lol... even the 50W... it's small-ish, but basically still a brick... not something I'd carry around all day, but it works well, and is perfect as a desk-top mod because it is harder to knock over, lol