I have a love-hate relationship with this.
It's definitely marketed for oily skin but I'd say it's more for normal to combination skin.
I personally don't like these silicone gel types for oily or very oily skin because I find that they don't offer much if any oil control.
I noticed its now $22 for .85oz but when I was using this back in middle school it was $17 for .85 oz which irked me but then I realized the smash box photo finish is 1oz for $35 so it is still fairly inexpensive.
I'd say this and the photo finish(original which is silicone based as well) are pretty much the same, you only need a tiny amount. If you find your face is looking more greasy, sooner than you're more than likely using too much. These types of primers are easily used too heavily (which is where the hate in the relationship comes in cause some days I may put on too much)
Although, I don't find either of these primers help my foundation (I have oily skin) last significantly longer, only a tad. I just find these types just really help powder foundations glide on and not look so powdery and the silicone helps the color match better since powder foundations tend to look lighter till your oils mix in and help it oxidize so I don't have to wait around for my makeup to match since silicone is an emollient type of ingredient and stays on top of the skin and sort "wets" the powder to the color it would be if your oils had mixed with it.
With liquids i don't feel it makes much a difference....I think My skin stays matte maybe an hour longer than normal but it feels very oily/heavy, I'll look in the mirror surprised I'm not an oil slick even though I feel like I am. The silicone helps tone down the shine but the oil is still there and I can feel it. Since my oils are on my face, mixing with the makeup, it liquefies the makeup and makes it prone to transferring. It's the same with my powder foundation so if things touch your face or anything it can rub off or makeup you seem like a total cake face and effect the wear time in that scenario especially if you touch your face a lot.
For those with normal to slightly dry skin I think these types of primers REALLY help pro long your makeup if you tend to have issues with fading and patchiness due to drier areas. I'd recommend it for that since these silicone types have that selling point of helping to "create a smooth surface" or helping "foundation glide on"
Let's be real, oily skin... makeup tends to glide off, we need something that'll help it stick on, if anything lol.
With that being said I think it's a decent primer. For oily to very oily skin it's not that great. I prefer the smash box photo finish LIGHT (which is water based and you don't have to worry about it effecting water based foundation)
or the Becca matte primer which I believe has kaolin clay to really help keep your face matte but can ball up if you use powder foundation.
So, if you have slight to fairly moderate oily skin, this will work for you.
If you have normal skin, go for it.
Dry skin, it can work for you too.
If you're very oily, try to focus on your skincare more but if that doesn't help, just skip these clear silicone types in general