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I did own an MSR 1-person, color red tent (very similar…
Source: bought it new
I did own an MSR 1-person, color red tent (very similar to the Carbon Reflex 1 tent), which I gave to a nice kid who was 5 ft. 9 in. tall with a smaller body than my dainty 5'11" and 195 lbs. It is far more pleasant to have more space inside so that you do not feel trapped into a bivy bag configuration.
In the earlier model MSR 1-person, I was camped in a lonely camp area opposite the Taylor River near Middle Fork of Snoqualmie in the late autumn. The small tent was really cramped.
As I was drifting off to sleep, in the silence of the night, I heard the high-pitched "scream" of a cougar just across the river from me, about 50 yards distant. The cougar was lonely...or just wanted "love." My blood supply turned to a thick syrup! Where was the "kitty"? Outside and nearby!
I stared into the blackness but did not see anything, nor hear cat-paws crunching the dry leaves. This was probably the usual 140 lb. kitty that we have in this area. Not a good companion to have in one's camping space. A larger interior of the tent would have made me feel more secure.
Before purchasing these mini-tents, set one up in the store and place a mattress pad and a similar sleeping bag, stretch out on top and see how all of this would really fit your needs and your wallet, too! All things in life are a tradeoff. Please look at a two-person, similar design, which has a packed size about the same as this item. Good luck! Meow!