Would be nice if they came with an attenuator as 2w is OK fully driven, but 15w and higher would be very, very loud indeed.
Yes, I have been looking long and hard at these for months now and always weighing up cost of a completed combo with 8" speaker that is anywhere from $229 for Joyo up to $429 for Bugera or Vox AC4 or BWM for $375 versus building a kit where 2w = $195 or 15w = $295 plus you need a speaker on top of that too. Tend to think 15w with a decent speaker would end up costing more than a ready made and have less features. Just my 2c worth.
Also not so confident playing around with all that current and would have therefore gravitated towards this 2w one. Still pondering and will watch how this turns out with interest.