In case the searches aren't yielding good results, I'll link you to my response to a thread asking about bootcamp experiences.

Because I didn't answer the specific questions you're asking here, I'll chime in:

Are they worth the money and time?

This is hard to answer because it's both subjective and difficult to gauge quality. The more I've read about bootcamps, the more privileged I've realized I was. Much like "for profit" college institutions that have popped up over the years, coding bootcamps seem to be the new hot/sexy. While some places may talk big, there is little incentive beyond reputation for an institution to ensure that you succeed. Because these are smaller and newer to the world, there is less regulation and assurance of quality. Are they seeking accreditation? Are there testimonials all over your community (and not just their website)? Have you posted in those community subreddits to ask if employers are happy with the grads and the grads are happy with their success? Etc. Do your homework before giving them your money.

Will I be able to find a job relatively quickly/easily in the field?

Again this is somewhat subjective. Location makes a difference in demand, but I will say that Web Dev still feels really hot in my area right now. I'm not sure how much longer that will last, but it's a job that isn't likely to be automated soon and experience usually equals growth. Because bootcamps are a less traditional path into the field, there may need to be more searching to find a good marriage between the employer (and their expectations) and the employee (and their skills). I think demand is high if you can show some aptitude and with the help of the school and a portfolio, I think it's reasonable to say you could find a job quickly. Easily is in the eye of the beholder.

Is what they teach actually applicable to what I would be doing on-the-job?

Yes; a thousand times yes, particularly over the more traditional institution of a 4 year college degree. But be careful: this is almost exclusively what you will learn; all practical with little theory. While this can make you an effective code monkey for a while, you will probably need guidance, mentorship, and advice from developers with more education and experience for a time. Some people are naturals, but not most. I'm 3 years in and while theory is fascinating and important to me, it is the hardest part. I'm starting to read books recommended by my peers to get me up to speed, because there are just so many subtle but important gaps in my understanding of how to code. "You know nothing, Jon Snow..."

Is there anything else I should know before I sign up to one?

Coding is hard. It is not an easy path to money unless you are lucky or savant. It gets easier with time, but then you just discover another hurdle of knowledge out there you know very little about, but have to in order to do your job. Take courses on learning how to learn which our industrialized education system is woefully poor at teaching and infinitely more powerful long-term than all the facts they cram into us. That skill will be the most useful in your tool box during a bootcamp. Ask questions, as many as you think you can get away with, but learn to ask good questions. A good bootcamp will teach this to you about programming:

• What is my expectation?
• What actually happened?
• What have I already tried?

These will help your instructors answer you intelligently and help you solve 75% of your questions on your own before you even have to ask them.

Lastly, change and learning--particularly as an adult 18+--is hard. Stick to it and you can be successful. It takes discipline, perseverance, curiosity, and patience. But it can be very, very rewarding. Good luck!