TimeBomb is one of two concealers by theBalm. It comes in nine shades that run from relatively light to relatively dark. I use the lightest shade, called "lighter than light".
I will say, the outside packaging is not necessarily the most
aesthetically appealing choice, especially if you plan on using it a
buttload. Because it is so light, it looks very faded. When you use it,
it obviously gets dirty and imperfect. The wear-related damage combined
with the appearance of fading and the vintage-looking packaging means
that it quickly looks like you are disgusting and have been using this
concealer since the 1980s.
The plastic inside packaging is less immediately unappealing, since it is nice and compact, but it's a little too fragile to carry around; mine has a big crack in it!
The product originally came with this kind of nasty-looking circular sponge that will get unsanitary really quickly, and I have long-since tossed it. A concealer brush or clean fingers (combined with frequent cleaning of the product itself) are both far better ways to apply it.
The weird and unnecessary anti-aging claims suggest that you should be using it exclusively for undereye circles. Although I really like it for this purpose, I use it even more frequently to cover blemishes. Lighter than Light is the perfect match for my Tarte Ivory foundation, so it can cover anything that is still showing. It also works really nicely over a tinted moisturizer or BB cream, or under a powder foundation.
TimeBomb retails for $18 for 0.26oz ($69.23 per ounce). This is absurdly reasonable. For comparison, Benefit's Boi-ing is $20 for 0.1oz ($200 per ounce) and Tarte's Amazonian Clay
12-hour Waterproof Concealer is $22 for 0.07oz ($314.29 per ounce).
Overall, the things I don't like about this concealer (the packaging, the stupid sponge it comes with, etc.) are definitely overwhelmed by the things I love about it (the coverage, the value, and so forth). Thus, I would say that it's a good investment for those of you in the market for a full-coverage concealer.