What do you want to know? I have some knowledge about the system as my job requires me to work with them.
Is yours one that has the bolt lock feature or is it one that does not have the bolt hold?
Well I tell you what I know - not what I think...
They obviously come from Russia and are based upon modifying an AKM receiver which is currently in production. Russia is known for their highly reliable firearms and the AKM is one of the best. HOWEVER, their quality control, craftsmanship, and manufacturing practices are not always consistent or the best in the world. So firearms from there is like a finger print. They are all different. So you'll need to run an assessment with yours first to determine what you have. The AKM was not designed or engineered for a 12 gauge shotshell. So it had to be modified. Generally the Saiga 12 works fine. It often needs some TLC to get it to perform as a defensive firearm. You may need to polish the chamber and/or bolt to smooth it out and make it more reliable. The model with the bolt stop/lock is preferred because the magazine doesn't always want to seamlessly feed from a closed bolt like the 7.62 x 39 round does. An AKM is not fussy about lube or maintainence but in my experience the Saiga 12 is a bit more fussy especially when operating in a dirty, wet, and cold environment like a wilderness setting. So get into a good hygene protocol and test your cleaning in the field before depending your life on it.
Also the top one to three 12 gauge shotshells tend to deform when left in the magazine for longer periods of time unless you use good high brass, high quality shotshells. So be careful here.
These can make good wilderness/defensive guns as long as you make certain the reliability isn't an issue. You can use birdshot, buckshot, and slugs making them highly versatile. For a woods/defensive application a three point sling would work because you can use it both as a three point and as a two point. However for carrying a pack a single point sling is really great. HOWEVER, you've got to be extra cautious because of the short profile of the shotgun with a single point sling the muzzle will be sweeping everywhere including over your feet/legs and all your buddies. This is unacceptable! So you must figure out how to carry it and be able to control the muzzle without having these issues.
Best thing to do is to unload it, buy some plastic 12 gauge training rounds (I can help you with this) and charge your magazine with the plastic training shotshells. Then sling the Saiga up and carry around the house/yard for a full 8-10 hour day and learn to live, eat, sleep, bathroom and everything else with it like you will in the woods.
Finally, while they are easy to shoot and shoot fast they are in no way any faster than a standard American built semi-auto or pump in the hands of a trained individual. My business partner is one of the top ten pump shotgun shooters in the world - placing in the top ten when he competed (now retired) in the International 3 Gun Championships. So, a pump can be as fast as a semi if one takes the time and discipline to learn how to master its manual of arms. The key to the Saiga is its packability and having a magazine which may or may not be a tactical advantage. They do have a high CDI factor tho.