Zespectre
It is hard to say this without sounding like a Gladius commercial. Please keep in mind, I like to take good care of my expensive personal stuff, but I am a professional Quality Assurance & Test Engineer; I break electronic equipment, and/or "complain" about it for a living. And, I am merciless.
I felt EXACTLY as you did the first day I had my Gladius. Now, it is my favorite grab & go tactical light...I now own two for personal use and am testing (AKA abusing) and loaning out a 3rd. I have had 3 others for "variance" testing.
My abused Gladius has proven very reliable, and it has seen a hard time. I loaned it to a Training Officer with the local PD, for a night tactics class, straight out of the long awaited $250 box. It came back to me with holster rivet wear, some scratches, and some minor nicks on the head... and a LOT of praise. I have dropped my Gladius in the toilet (an accidental "brown & yellow" test) and onto blacktop twice, once from about 8 feet. I have unscrewed the tailcap an estimated 400 times myself. (I am working on a couple of 'special' projects) I don't know how many times others may have removed the tailcap. (DO lubricate the body threads and o-ring with a good silicone grease; Otherwise, the proper installation feels a bit rough, and is it is harder to recognize when one does not have proper alignment... especially while running... in the dark.)
I EDC the light in a pocket or in a SF V70 holster. The present (actually, PAST now, I think) black ceramic coating has not proved as durable as HA-III, but I love the grip, and it is more durable than SF's black finish. Mine looks like a working professional's light. If it gets ugly, I may touch it up with some Krylon.
After I got my 2nd and 3rd Gladius (now my 'personal' lights) I started playing with shock/drop, over voltage, and high temperature operation. I shouldn't say much at this point, other than the light has proven more reliable and durable than dozens of other "professional" lights. I have killed several lights of other brands in the last 2 months. Try mounting most lights on a 12ga shotgun. I once blacked out 3 different lights in one box of 25 rounds.
SUGGESTION
Don't worry; Use it and enjoy it. If you have a job where you go in harm's way, (with or without firearm(s), but especially with) the Gladius is a sound choice and will likely grow on you quickly. If not, at least one of us that owns a Gladius would like to find another in B/S/T.