Monologue is a fantastic synth for the money. I bought one for my young son and have spent time learning how to use it so I can show him how it works.
The sequencer on this, despite only having 16 steps, is incredibly good and really easy to program. In addition to the notes, it has four tracks on the sequencer for modulation so one can create some pretty complex and evolving sequences which make sound like there are way more than 16 steps.
This synth combines the best of two things: it has presets but it also has a “panel mode” so that the sound of the synth will directly represent the physical positions of the knobs and switches (as in a non-preset synth). Furthermore, the screen displays the knob values when you turn them and, if I remember rightly, there’s a way to get them to display the current value whilst not changing the value. This is really useful for learning how patches are created.
I haven’t tried the bass station 2 so can’t comment on that. I did think this was better than the Microbrute though in terms of build and features.
The only downsides for me are, firstly, that the envelope generators aren’t full ADSR but are AD. This is partially alleviated by 3-way switch which offers different envelope types. Secondly, noise replaces square wave on the second oscillator so that it's not possible to get two square waves nor is it possible to have two oscillators sounding alongside noise. (I personally find a two-octave keyboard a bit short and am not fond of mini keys, though of the various mini key types, these are the nicest ones (along with the Yamaha Reface).)
Aside from that, it’s a wonderful synth and incredible value for the money. I paid £236 new and that can still be had if you shop around and get places to price match.
You can’t really go wrong with one of these as a first synth. There are so many great sounds to be had from this. In fact, I’ve thought about getting one for myself, though I have another “better” synth already. The quotation marks are because the monologue actually does some stuff that mine can’t do, namely ring modulation.
Bear in mind, this is a monosynth so only one note can be played at once.