I have this but similiar. The D78
DrySpec D78 Waterproof Motorcycle DryBag Modular Packing System in Black Grey & Orange | 78L Total . I've put the set through several rain storms including one where my boots were so water logged, it took a week for the water in the soles to dry out. All the content was bone dry. The top load of the 40L does make it very easy to pack and unpack. The only feature missing from the bag that some newer ones have is the air pressure release. It only means you have to let the air out before you do up the final buckles but it also can be kept inflated if there's something at the top you don't want squashed.
The main 40L is great but the side bags, you better hope you don't have anything you need to get at urgently. I haven't really had any trips where i've needed all 80L at once and my tail bag and tank bag. All my experiences, i've ended the day at a hotel/airbnb so with soft luggage, its always several minutes spent taking the bags on and off the bike. For this reason, I was thinking of replacing it with hard cases and racks. I wont need it now that I have a moto-van though.
I used the two 20L side bags on my Honda CB500F cause the exhaust was low down. My 790 Duke's exhaust was super high up so I bought the D40 separately. I believe you've seen the SW Motech tail rack I got and I only got it so I could mount the bag without it getting melted. Since the whole Work From Home situation might not change, I never bothered getting the top box for work commuting(the backpack was sufficient).
All said and told, the bags themselves are quality products, just not to my needs. Shane, if you want to buy my D78 off me, let me know. Near pristine condition. Needs a spray with the garden hose to get the road grime but the bags are plenty durable. Its mismatching with the 40L in grey and the saddles in black.