Just wanted to add an update after owning, and frankly enjoying, the Cleanstream DBC for the past month. I haven't had the pleasure of the ‘original’ smaller DBC, or the German manufactured items, but this one works well for me. I get a good seal every time, using 6-7 pumps on the internal balloon. It isn't showing any signs of distress yet, and I hope it lasts.
My thoughts on the balloon size…it is definitely large. I find it quite enjoyable because of that, but that fullness is also something I enjoy in other toys. Despite the size, I find it comfortable, but you definitely know it is there from the pressure in the rectum and, as I mentioned it in my previous post, the prostate stimulation. Again, I love it, and the precum flows freely as soon as it is inserted and inflated.
As suggested here, I tried a party balloon with the tip cut off and placed over the DBC's internal balloon, a DBC condom of sorts, to ease insertion and smooth out the ridges on the DBC. It worked well, though I can use the DBC without it just fine, but the best part of the party balloon was easier cleanup. Like many I expect, I hate the tedious and necessary evil of cleanup. Particularly because I demand as close to sterile as I can practically get!
The last thing I'll mention is that a check valve is a must to easily keep the hose clean. With the DBC, larger volume enemas are easier and much more comfortable for me, but the back pressure generated can be quite a bit more. Additionally, it allows the DBC to be disconnected from the hose to aid in retention, without worrying about the bag itself.