I feel like it's basically someone who'll give you a program you can find online and who will spot you. I've seen a few around my gym working with clients, it seems like the main reason they have them around is for accountability reasons.
The PTs at my gym charge $90 per session which is more than a month gym membership (it costs $60 a month to go to my gym).
Has anyone used a PT before? What was the experience like and was it actually worth the money?
It really depends. When I first got into working out I've done this twice. The first time I got a guy that was just chill as ****, His actual name was "Quest". I guess he is partly indirectly got me into pick up while I started that stuff 2 years later. I would say he was top 3 of the trainers I've seen. But he was a more muscular athletic type, so that fits well with me.
He only charged me like $150 a month to train me 3 times a week, but it was in his off time usually just before or after his shift. That was a killer deal. He left and then I eventually went to LA Fitness, paid like 2k for a bunch of sessions that ended up taking 3 years to finish up. So in that time I saw a lot of variety. What I learned is if you're new to all this, pick a trainer who you want yourself to look like. Someone with a similar stature as you but with the muscles you want. Now I'm not saying all other trainers can't be versatile, sure they can. One of my top 3 was this older chubby bald dude. He'd be the last guy you'd pick to train you, but he knew his ****. I wouldn't say my top 3 in any order. The first guy I mentioned is in there, he taught me negatives. And it's hard to choose who to describe as a 3rd top 3. I had this one hugely muscular guy train me, like think Dwayne Johnson. I couldn't lift above my chest for a week. There was my drinking pal, well, I partied with many of the trainers there on occasion, he was probably pretty typical. Mix of free weights and machines. I think a good balance, but he didn't challenge movements.
The moral of the story is they are all different. It's like picking a doctor, a dentist, or your insurance company. But how long should you see one would depend on you. I would recommend someone get a good one for a good 2 months if you've never done this before. Watch youtube videos from respected trainers. Take all safety precautions, particularly your form. Also remember that the gym isn't a replacement for proper nutrition.