My go-to machine has always been my "ancient" early model Time Ranger. Even the new version of it has a tough time winning me over. I know how it acts and anytime I get an "iffy" signal on a different machine, I'm wanting to grab the ol' TR to see what IT sez...
That said, I also have a Landstar and it is just as capable on small and/or deep signals. It has a more "analog" mindset with it's old-school twisty knobs instead of the incremental action of "digital" buttons. You can tweak the knob settings to exactly where it works best, while a digital button press might land you on either side of the exact "mark" you're aiming for. Granted, the digital version is more precise and repeatable every time, but a hands-on-the-knob approach is where it all began for detectors and there's absolutely nothing wrong with having that "feel" of being in control.
If you happen to own an older Landstar, you might also have ID in the all-metal no-motion mode, that's another big plus in my book. That's why I like my old Time Ranger versus the newer version, since the old-style version has full target ID in all modes. Digital adjustments are exact and easily repeatable if nothing else, and I do enjoy the quick press of a couple buttons to get it set up right where I like it. I guess it comes down to how small the minimum adjustment increment is in digital mode, to allow the user to fine-tune it about as close as the teensy tweek of an analog knob might do.
Using the Landstar was an easy transition for me from my Time Ranger, and I can easily move those knobs by just a touch on the fly while I hunt. The Landstar's manual ground balance is a big plus for it. By comparison, the GB process on the TIme Ranger is a bit more time-consuming and there's really no "tweaking" of it allowed afterwards, except by maybe expertly choosing which patch of ground to balance it to. You can press Smart-Trac on either model in no-motion for a quick GB fix, but the Landstar lets you just slip the knob a little either way to your own preference or changing conditions.
I can see a use for both the Landstar's analog and the Time Ranger's digital methods, so that's why they're both keepers in my book! Put another way, I've never been disappointed with any of the Bounty Hunter models I've tried. They all have their own "flavor" of that same formula that's been proven over the years and copied in some fashion by about all the other manufacturers.
-Ed