I'm a tech (with a sprained wrist at the moment). Yes the job is very stressful! There are times when we are slow (we treasure them!!) but most of the time we are busting our butts. But since I love working with animals, it's so completely worth it. My only major concern is my back, I have a very bad back and quite an extensive history of disc problems. But I have learned not to lift anything I don't feel comfortable with. Most of our clients are nice, although we have a few loonies and jerks. Most of the animals are well behaved, we only have a few instances of dogs trying to rip us apart and cats trying to eat our fingers.
Please feel free to pm me if you wanna talk more (my wrist is killing me from writing this!!)

-michelle