Just one sound. No parameters to tweak. Not even a tone control. No pitchbend. No MOD wheel. No patch bank. Nothing.... Simple...!
Well, for what it is, it's quite a good bass guitar sound, and as long as you want the same bass sound on everything, it could be for you. After all, the Beatles had the same bass sound on all their stuff and it didn't do them any harm.
But it doesn't sound like a Hofner Violin Bass, more like a cross between a Squire Jazz and a Rickenbacker, plugged into a cheap practice amp.
Don't get me wrong, sometimes that's just the sound I'm looking for so I will probably keep this in me VST folder (for a while at least).
[Update] Had a reply to an e-mail I sent to George Yohng, the creator of this synth, regarding the lack of controls. He just said, "it's free so no controls."
At the top of the present page, you see the image of the bass guitar?
At the right of the image of the bass guitar, you see a link called "Product". I drives you directly to the webpage of the product (it works the same way for about 95% of the products presents in KVR).
And for this bass guitar, at the top left of the webpage you'll immediately find the download links.
If you want to see all his other products (you're right, they are very simple but they sound very good!) at the top of his webpage you have a menu in blue characters, with "Software" among the commands of the menu. You can browse among his softwares by this way. Some are payware but many are freeware. They all have a very good sound, very few tweakable but very good as they are. George Yohng is an excellent developer in physically modelled synthesis. By the way you could take a look at his articles too...