I'm a singer/guitarist, and my biggest concern was being able to hear myself without having way too much feedback on my mic. My vocals are not quite potent, so I'm quite prone to getting signal from the guitar amps, and of course my vocal monitor.
Having a limited budget is the keyword here. I'm not a professional artist, so having a high-end ( and considerably more expensive) gear feels like an unnecessary step to take at this point, so along comes the the t.bone IEM 75.
I've been using the system for a couple of months now, and it does what it's supposed to, and it does it well. Maybe I had very low expectations given the price, specially when compared with the likes of Sennheiser and Shure... you know, the "big guys", but after setting it up ( which was rather simple), I have to say I was slightly impressed by the sound. I was expecting a very limited signal in terms of frequency range, pretty much radio-like, but it was not the case. The bass is good enough, and the high frequencies are OK.
With the provided earphones you get some sort of hiss on the top-end, but a quick test with a better pair of earphones reduced this quite a bit. Another thing to have in mind regarding the provided earphones: they drop quite easily with the slightest movement. Even though they don't sound bad actually, then again they move easily, so even if they don't snap out of your ear at the very least you'll lose the insulation, and you'll stop hearing the low frequencies.
I upgraded the earphones to Shure SE215, which are designed to keep in place, allow mobility and facilitate your performance.