I do not know about the Horizon iron but have gone through several of the Coverite irons. They are nice to work with concerning the rounded sides but in reality it is just a matter of which ever iron you really get use to.

There is an Achilles heel with the coverite that may eventually catch you if you are not aware of it and that is the electronic temperature control. Yes it is more Hi tech than the older bi-metal contact plates used in all the others but it is fragile and it only take just one drop off the table to a concrete floor or otherwise at just the right angle and that little blinkie light goes out forever along with the heat.

Its for this reason I tend to use mostly the old bi-metals and do just fine with them and it seems I am always getting spares with every buy out.

Now the fact that they are almost always half the price and sometimes even less I just reccommend to my students to just get whatever is the cheapest and they will do fine.

Heck check out any club swap event they usually go for 2 to five bucks in these parts.

John