I have the Soundsmith Strain Gauge. It's on a Basis 2500 with a Vector 4 arm. McIntosh c22 preamp, MC275 IV amp, Spendor c8e speakers. Since it has it's own preamplifier, I also have it connected to my c2200 preamp, which feeds a pair of c30s and an MC240 (for other rooms).
The Strain Gauge replaced both a Grado Sonata and an Ortofon 2M Black. I found the Sonata to be too dark and the 2m to be too bright.
The Strain Gauge is...just right.
I listen to mostly hard bob jazz.
The main difference I hear is a definite improvement in how immediate the music sounds. There is a crispness to a string being plucked or a cymbal being hit that just wasn't there in my other cartridges. Not to say that it's over-extended on the high end, it's actually better balanced than anything I've heard. Low bass control is outstanding. The ability for my system to resolve soundstage is also much better. I go to a lot of live events, this is the closest I've ever gotten a stereo system to sound "live." It sounds great at low volume - the only cartridge I've ever had that does. At high volume, it's simply incredible.
My wife is passive about equipment (except how it looks) and she noticed that the sound was vastly improved.
I was able to audition the Strain Gauge at Soundsmith's facility in Peekskill, NY - the owner of the firm personally demo'd his Aida cartridge and the Strain Gauge. I thought the Aida was wonderful - but the Strain Gauge was even better, especially in that all important mid-range. It also has that sense of presence and immediacy that I've never heard anywhere else.
I don't know that I'd call it a bargain. But with the stylus being easy to remove (and the way the cartridge is built, it indexes perfectly when you put it back in), I no longer worry about the cantilever snapping housekeeper (she's gotten a few of them over the years, but she's a nice person who works hard). If she and I live another 50 years, the Strain Gauge will have paid for itself.
I bought the least expensive Soundsmith preamp to go with it - the owner, Peter Lederman told me the guts are same in every preamp - the more expensive ones have nice LED gauges and readouts.