I have been a few times and its a good place to do some drills/practice etc. The water is warm there at the moment about 20c, I was there last weekend.
If you leave the waters edge and take a left hand course you will be on a fairly wide ledge about 6/8m there is often a lot of life around there, including the pike(s) in the reads, its usually quiet there as well. It goes under the pub and there is a swim through and the 'nautilus' so its worth the effort.
You can also swim over to the bouy and drop down onto the Stanegarth, a tug thingy, that was purposely sunk a while back and is at 22m (to the bed) its been stripped, deliberately, of anything dangerous so its a good wreck penetration.
Generally I'd say the place is very safe, if crowded sometimes. It is often better at weekends to get there late as several people will have cleared off by then and you may get in the bottom carpark, remember to ask at the check-in.
They operate a 'log' system which gives reduced entry fees, you will have to pay full whack if you havent joined, but they give you a credit for this amount against the joining fee (or they did). Membership can be for varying lengths and costs vary accordingly.
No Nitrox at weekends, air fills can take a long time at weekends, so you will get a good SI
The silt isnt too bad so viz can be poor rather than awful. I have gone off away from the main crowd occasionally and deliberately kicked up the silt to make sure I wouldnt freek out if I ever encountered zero viz so the silt is perfect for that 'drill'.
The hard surface all around the waters edge makes it a clean place and the other divers are generally OK about kit being in there way.
I am sure you will have fun.