I bought an Allen Sweet Spot built by David Allen a few years ago. Before that I had tried many amps and was never satisfied. Once I got the Sweet Spot, my search for amps was pretty much quelled. Recently I wanted to build an amp kit and the Allen Chihuahua seemed to have all the features I was looking for, and with the frequent 10% discount that's offered on kits, it was a great deal at $630. I documented some of the build in another thread so I won't go into those details, but the amp turned out great. The amp is a hot-rodded blackface Champ with Treble/Mid/Bass controls, reverb, master volume, and dual inputs (normal and -3db). The Mid control also doubles as a "Raw" control, which removes the load of the tone stack as your turn it up, giving you a more overdriven and somewhat tweed-like sound. Though on the one hand, it's a hot-rodded Champ, on the other hand it's like a single-ended Princeton Reverb without the tremolo. The preamp section is the same as the Sweet Spot (which is based on the Princeton), but instead of running two 6V6s or two 6L6s, it runs one 6L6 or EL34 giving you around 10 watts of power. Considering the original Princeton Reverb was only 12 watts, there isn't much difference. As most of you know, 10 watts can be loud, but the master volume on the Chihuahua let's you control it better (though you can keep the master dimed and use an attenuator; I've used both approaches). So how does it sound? Like a great vintage blackface amp! Though I've only had experience with a few vintage blackface amps, I always thought my Sweet Spot sounded as good if not better than the ones I've heard (and way better than any Fender Reissue). The Chihuahua sounds as good as the Sweet Spot, but with some small differences. The Chihuahua is a little brighter so I tend to turn the treble slightly lower than I would on the Sweet Spot, and the bass is slightly less, so I tend to turn it up a little more. I'm guessing this difference is due to the power amp section since the preamp designs are the same. Obviously having a 10" speaker makes it sound different than the 12" speaker; it would be nice if there was a 12" version of the Chihuahua, but you could always buy the head and a 12" cab. The reverb on the Chihuahua sounds just as good as the Sweet Spot. It doesn't have the tremolo, but I don't use that much anyway so I don't miss it. Having the Mid/Raw control and the master volume makes the amp very versatile; it's easy to get a good overdriven sound at a reasonable volume, and you can get tweed-like sounds from the amp. One minor thing to note is the specs list the speaker as an Eminence Copperhead but I actually received an Allen C1060, built by Eminence. When I asked David about it, he replied, "It is a modified Copperhead with a slightly longer voice coil for a little more bass. Eminence rates it 75W but I think their ratings are sometimes too generous. I rate it 60W. I've tried a lot of 10s in that amp. The WGS G10C is pretty good, too." I've also tried a Jensen C10Q in mine and I'm undecided which I prefer; the Allen speaker seems more detailed while the Jensen seems a little more loose and vintage, but I need to let them break in before I could say for sure. The only feature I wish the amp had was the ability to accept 6V6 tubes to bring the power down some (to 6W). David recommended how it could be changed and maybe I'll try it in the future, but for now I'll stick with the 6L6. If I didn't already own a Sweet Spot, based on my experience now I think the Chihuahua would be the only amp I need (at least for the blackface sound). Though I like the small size with the 10" speaker, just having the head and a 12" cab would make it slightly better (to my ears, at least). If you're looking for a great blackface amp primarily for home use or small gigs & jams, I can't recommend the Chihuahua highly enough. If you buy it built, it's $1000, which is only $100 more than the Fender Princeton Reverb Reissue - but vastly superior in quality and sound. If you're handy at building amps, it's a steal at $630-$699 (depending on if you buy it during a discount time). Allen's webpage has all the specs and a lot of sound clips. Check it out! http://www.allenamps.com/chihuahua.php P.S. As many people have said before, David Allen is a GREAT guy and a pleasure to deal with.