Performance ranges from average to truly terrible, the only really great performer is the texting input and format which makes sense as that is all this phone is any good for.
Camera: there are some very outstanding 2 MP snappers out there that go beyond the call of duty so to speak, this phone is not one of them. The photos taken outdoors feel too soft and all fine detail is completely erased. Indoors the noise is so high that photos look terribly pixelated and once again no details are viewable. Video recording does not fare much better, at 15 FPS videos start to get pixelated at any hint of a sudden movement, this is not a phone to record some of life's spontaneous moments or take snaps of them.
Phone: the occasional lag or stutter is present and can sometimes get very annoying especially when the phone is new or handling too much data (for example when the micro SD card starts to fill up), but after some time they become a rarity. The phone feels slightly smoother than most phones in its price range, so no complaints there.
The Internet browser is very sluggish, so installing Opera Mini is very strongly recommended. Speeds are truly frustrating on the 2G network but relatively fast on the phone's 3G network, which can support up to 7.2 Mbps speeds. There is no kinetic scrolling or Samsung’s famous one touch zoom or any fancy zooming options at all, just the tap to zoom in/out feature.
Calls: call quality varies depending on location and signal strength, although this is true of all phones most try to keep a certain level of quality no matter the circumstance, not so on the Solstice, if you're in a bad reception area get ready for some static and cracking voices. In places with a strong and clear reception, calls are mostly clear and in no way hinder your conversations, even if there is a hint of noise in the background. The loud speaker offer a decent loud volume, but it can get a bit hard to hear if you're in a crowded area.
Music player: the music player looks basic, there is not much eye candy or too many options on it. But it is functional, has a decent range of optimization options available and can fully replace any basic MP3 player out there. On high volume the music becomes just a loud screech, so the best listening quality is attained at average volume.
IM: instant messaging, social networking and texting are this phone's strong point, as such there is a full and capable easy to use suite of these features. AIM, YAHOO and MSN instant messengers come pre installed, most other clients can be downloaded.
Battery: Samsung quoted battery time is 5 hours talk time on a single charge, the actual time for the Solstice is 6 hours on a single charge. Standby time is 250 hours. On average the phone's battery is a... well average battery. Most people will have to charge it every night or so.