You can use a stuff sack, piece of tyvek, or most anything as a very small ground cloth / floor mat under the entrance. Step into your sleeping bag on the mat, then sit in the hammock and pull up your legs. done. Its very simple. Since you lay on the diagonal your feet are never near the entrance making nearly imposible to fall out while sleeping.
The reason I like the bottom entry is because of its ease of use. It takes just a true 2 or 3 seconds to get in or out of a sealed hammock.
I am going to upgrade to a larger tarp to have a larger wet weather cooking and gear storage area.
I also see the advantages of the others types of hammocks. But , when bugs are a factor I perfer the HH doe to its ease of use.
With that said I have very limited experience with other hammocks