The series is probably worth a try if you don't mind like the Infinity Engine combat and are up for a lot of dungeon crawling. Here's some assorted points about the games that stick with me...maybe you'll find them helpful.
IWD1
-It's fun to make an entire party, but you definitely want to have some idea of what you are doing. A poorly chosen party, whether for power or fun problems will result in a lot of headaches. On the other hand, you do have a lot of freedom.
-The game is "challenging" but sometimes that's not always because of good encounter design. Sometimes the game just throws curve balls at you, like early on you will be going through a dungeon, possibly just having picked up your first magic weapons, and then the game will spring undead on you that are immune to normal weapons. Thanks to the semi-randomized loot, you may not even have a weapon anyone in your party is capable of using well, much less your Fighters. Other times, encounters are nothing but numerous beaters descending on your party. Dealing with a few extra-beefy beaters is nothing tricky, and numerous weak mooks are also nothing difficult. But enemies of moderate health and damage output in large numbers really do bring the Infinity Engine combat into a state in which it becomes a little hectic, and difficult to control. Often times you'll have to run your weaker, less frontline capable party members around if an enemy locks onto them, rather than being able to use positioning to your advantage.
-Difficulty as you progress is rather counter-intuitive. It starts challenging, stays challenging up until a huge spike (the Hand for those in the know), and then plummets for a while, only recovering for short spurts. Fortunately, it never becomes too easy, but I little short of my sweet spot for difficulty.
-Dungeons are large, have many levels, and are mostly well designed, and atmospheric. Which is good, as that's where you spend most of the game. One or two dungeons are a little weak, but those are much shorter than the main ones.
-Loot is a little wonky as the a portion of it being semi-randomized can make for some annoyances, namely a scarcity of the type of weapons/armor you need and a glut of what you don't. You shouldn't have much trouble, just don't make your entire party halberd-freaks or something. Pro-tip, excellent swords and bows are always in abundance. Especially if you are a Paladin or are OCD about the quest in the beginning.
-The endgame is a little weak, mostly due to the rather bland final boss fight, but I can think of few RPGs that actually have a fully satisfying endgame sequence.
-Very nice aesthetics, second only to Torment on the Infinity Engine. Backgrounds look nice, the music is nice, and enemy sprites look really nice. While I have a personal taste towards some of Bioware's works, Black Isle did a much better job technically (and arguably otherwise) on the sprites in the Infinity Engine. Hell, they even do a good job weaving together a story.
IWD2
-3rd Edition rules....are a mixed blessing. I don't particularly like them much myself, at least not in IWD2, where I don't think they were implemented well at all.
-Experience scaling worked terribly, discouraged any use of the races with level modifiers, and encouraged stifling of level-ups later in the game, in order to avoid fighting through tough encounters for chump-experience.
-Encounter design...sometimes it works well, sometimes it doesn't. A lot of thought went into the encounters, but the results aren't always good. Sometimes you get a very creative fight, in which enemies use abilities wisely, there are an interesting mix, and perhaps there is some unique gimmick. Other times you have an encounter that was supposed to be fun and interesting, but quickly becomes annoying due to a gimmick gone wrong, like teleporting enemies from behind. Other times, you face a stupidly overpowered mofo with too much hp, multitudes of resistances/immunities, and enormous wrecking potential. Don't get me wrong, some of the encounters/fights in this game are brilliantly designed (the bridge fight, holy avenger, battle for kuldahar) but others are downright awful (basically most of the big fights in the last dungeon, including the abysmal final boss fight).
-Dungeons in this game got a little too creative at times. Most are good, but some are annoying and overwrought (ice temple, stupid time travel part, monastery trials).
-The original Icewind Dale, in the expansion, had an option for "Heart of Fury" mode, an enhanced difficulty that added scripting and enemies to many key encounters in order to make them significantly more challenging, as well as tweaking global variables. It was tough...but fun, and fair. Heart of Fury in IWD2 is just plain stupid. It's a "new game plus" that ups the levels, abilities, and stats of all enemies such that the very first goblins are on par with a party that completed the game in normal mode. Thanks to the 3rd Edition rules, the game is reduced to nothing but cheese tactics, and powergaming in which if you ain't a spellcaster...get out.
-Again, great aesthetics. Sprites look nice, backgrounds are quite pretty, and the music is well done. The story however, is completely retarded, and feels like they tried to cram in as many references to the first game as possible. It's better off ignored.
All in all, they're both worth trying, even though I am a little harsh on IWD2.