As an owner of this fretless bass, I can tell you that a lot of people will want to try your bass because it sounds so good and after they've tried it they will be amazed how easy it is to play it and will probably tell other band members how fun and easy to play this bass is. Usually, bass strings are hard to press if you're a guitar or a piano player with gentle and soft hands, but not on this bass, it makes it really easy. So, if you don't like people touching your stuff, this is not the bass for you.
I generally have my strings on mid-low action and it allows me to play faster without too much effort.
I used to own a Squier jbass before this one to which I've removed the frets by myself and I've always had issues with the string action and the neck had a bow that would always bend after a while. Compared to this Marcus Miller bass it's light years apart, it was really worth buying for me and I still prefer it to most basses.
Before purchasing this bass, I was unable to decide if I wanted to buy a passive or an active bass, and I just loved the fact that you can switch between the two any time you want, or if your battery runs out.
The unfortunate part is that it requires two 9V batteries to use the built in pre-amp and considering I have bad habits of forgetting to turn it off and plug out the cable, they sometimes get drained, but that's just a personal problem of mine...
Anyways, there's a lot of different sounds you can create using the pre-amp, especially because it's a fretless bass. Just think of the possibilities with two magnets (You can have one on 29% and the other on 71%), tone, bass, mid, low-mid, high-mid, treble. Truly a fun tool to play with if you're creative.
Overall, it feels really well made for a mid price range bass.
I've had problems with one of the potentiometers, it stopped working after 3 or so years so I had to replace it with another, but that was an easy and cheap fix. Everything else is still in order.
Also, the strings that it came with were decent and I've been using them for a long time.
I really have nothing bad to say about this bass, and I hope if you purchase it you will feel the same.