Pros
Low supervision - most accountability is held through various tracking apps on a company phone (at least, for the drivers). If you don't like working with a manager looking over your shoulder, this is a nice job. Low effort - not to belittle the security aspect, but this is definitely an entry level position. Most jobs with this company simply require you to be attentive and observant. You may occasionally interact with people (clients or otherwise), but if anything serious actually happens your main job is to call the police. Stability - this company has been around for quite a while. Despite the high turnover rate (they seem to struggle to replace people at times), I don't see this company failing any time soon. Overtime opportunities - again, there is a high turnover rate here. If you let them know you are willing to work extra to cover scheduling gaps and call-ins you are likely to get the extra hours.
Cons
Unpredictable schedules - your best bet for getting a job here is by telling them you are available any day, any time. They will take you up on that offer, often with graveyard shifts. Also, schedules are only made a week in advance so you do not have much notice for making plans. Many positions will fall into predictable schedules, but it is not uncommon to cover extra shifts at random. Little to no training - you will receive general training when you are hired, but very few positions get specific training and instructions. You will often need to work out what is required of you from limited directions, and usually your best bet for clear direction is to get the client contact number from the office and ask them yourself. Budget equipment - the company-issued uniforms are kind of low quality. They work, but they could be better. I actually met someone once while I was on a daytime post that commented on the uniform, saying they ran a different security company. Puget Sound seems to have a reputation in the industry... Additionally, most vehicles are older and minimal maintenance is done on them. If something is broken, report it constantly or they are liable to forget about it.