I used braid exclusively for about 4 seasons on big penn spinfisher fixed spool reels and kilwell powerplay rods. The braid was an early type with a quite thick coating over it. While it was a bigger diameter than todays powerpro etc it was still pretty thin and because of the coating I was able to do a good knot to the nylon leader (8 meters 60lb black magic tough trace).

The pros...

1/ Fantastic bite indication. When conditions allowed I would hold one rod with a turn of braid wrapped around my hand, rod pointed seaward while I watched the other rod in a beach spike. The faintest touch from a fish on either rod could be picked up. I swear that sometimes I could feel a lemon munching on my crab bait or feel a fish swim into the line. The entertainment factor would keep me fishing longer and harder in the middle of the night.

2/ I would say my hook-up rate from a rod in a rod holder was better with braid. Kilwell QTXs are fairly stiff and combined with a boss breakaway at the other end a fish cannot run far before it runs into solid resistance and hooks itself. (I was generally using gamakatsu circle hooks which I don't strike with anyway)

3/ All the advantages of thin line....not so affected by swells, side currents, side winds and more distance etc.

The cons...

1/ The biggest pain in the butt was line twist. Braid is just not "stiff" enough to "turn" the nylon leader. As a consequence when you hook a ray or any fish that pulls line off the reel the extra twist works its way down the braid to the last few meters of braid above the shock leader and there it stays. Its a competition weekend its 1am in the morning and the fish are biting. You go for the big cast and really put your back into it. You feel/hear a faint "snick" as the braid to leader knot touches the edge of the first guide. There is a millisecond's pause in the line travelling at 100km/h thru the guides and a slight backup in line flying off the spool. There follows a sound like the "crack of doom" - a loop or two of braid has wrapped itself around the first guide. On the positive side your sinker and bait are probably still travelling seaward at 100 km/h but unfortunately they are not attached to your gear. Its 1am you are cold, tired and its time to tie another braid to leader knot - not something I ever liked doing on the beach daylight or not.
Anyone thinking of using braid must have a first guide that is designed so that it cannot be "wrapped". (very occasionally it was the next guide up that wrapped)
Line twist can cause knots and line tangles in the guides during casting that don't wrap. Often, particularly at night I would not be aware of it until I was winding in. These could be bad enough to warrant cutting the line or putting on a new spool.

2/ Anyone wanting to try using braid should use rods with good flexibility in the tip - rods that you can "wind" a bend into the tip against the weight of the sinker when the rod is in a beach spike. I used kilwell QTXs which I found to be fantastic rods in many respects but they are not flexible enough in a beach spike when using braid. In swelly conditions the breakaway sinkers would break out because of no flex in the braid and not enough flex in the rod tip.

3/ I had to use a shock leader of nylon. 8 meters of 60lb did the trick. I never felt tempted to try casting without it. It was enough of a shock absorber to prevent hooks pulling out of fish and preserving the bait on the hook when going for a big cast.
Using a leader means a braid/nylon knot which should not be bulky. I used a form of albright knot but I never liked tying it on the beach in the middle of the night in a Wellington or Wairarapa wind! I subsequently tried this knot with powerpro but found that it tended to slip.You have find a knot that you are confident in. This knot is the weak point in your gear.

All this sounds like braid is more trouble than its worth but I really liked it mostly because of the extreme sensitivity but then I really like actually holding one of my rods if the conditions allow. The trick was to keep on top of the line twist and removing it before it turned round and bit me in the arse. The best way for me was to do a big cast along the beach, cut the leader off and wind in, pinching the line letting it untwist on the beach, then retying the leader. Every 2nd or 3rd time I fished I would do it - a bit of effort but tight tangles of braid are a nightmare.

Use a rod with a flexible tip that has non wrap guides.

Find a good braid/nylon leader knot