You probably stumbled on this product page out of curiosity, because you had never heard of Palmer before. Neither did I! You might also be wondering if you'd be better off paying more for an Aguilar or ToneX product. Maybe?
The thing I love about the Palmer is that it's a very straightforward plug-and-play product, delivered in a very attractive little package. It's a joy to use, and you don't have to pair it to your phone, fiddle in some bloated software suite, or watch a bunch of YouTube videos to get it sounding good. I don't know about you, but having less screen time is great, and it leaves more time to, you know, play music!
The Palmer sounds pretty good. Sure, you could get better sound out of an Aguilar Tone Hammer, but at twice the cost. Meanwhile, these cheap little Korg/Vox amplugs don't come anywhere close to what you get here. Palmer gives you a loud, full bodied bass sound, with some pleasing characteristics. I wouldn't use it for live performances, but it's more than enough for quiet practice at home or on the road.
The build quality is quite good. The knobs feel good. The effects are fine. Fuzz sounds fuzzy and distortion sounds distorted. It can be battery-powered, and one 9V battery will last you a while. The compressor and cab settings don't affect the sound as much as you'd expect, but they don't really matter that much. You can also plug in an audio device via the auxiliary port, to play along to Spotify or YouTube.
Should you buy this over a ToneX product? It depends on your budget and what you're looking for. As a practice headphone amp, the Palmer bass amp is very much feature-complete, and delivers good results. Also, unlike the ToneX One (which I do like very much), you don't have to spend hours configuring it before it's good to go!