If you haven't got others in a fleet, then they're 'not bad', but there's probably a nicer alternative out there.  If you were to give us more details about where you sail, what experience you've had and what you'd expect out of a boat- racing, cruising, maintenance, fitness levels, body weight etc we could recommend the alternatives.

Solos:- from my limited experience since Nov:

They are not the most exciting boats from an adrenaline perspective, but the racing is exciting between them, even if naff all wind.

They are certainly cumbersome with the centreboard casing that will require a bit of learned steps before the bruises on your shins disappear.    

You can't square the rig off because the stays get in the way, which means there's limited scope to run by the lee.  However in most wind you will sit on the side downwind, which makes them very forgiving for bad knees and backs. 

The rules are very, very strict.  This is either good or bad depending on your POV, but be under no illusion, they are strict and will stay strict and everyone knows where they stand, including people who will be turned away from events if they cannot present their measurement cert.  I have a measurement cert and signed sail with an ISAF stamp, I would expect if I went to a class association open meeting for everyone else to be in the same position.  

The boats vary- expect to spend 3.5-4k to get a competitive one.... which makes them double the price of a Laser.  Whether they are double the value, is a personal question no one can answer for you.  It is for me.

The rigs are not SMOD one design- this gives some choice and flexibility, but it adds some cost over the 'Laser / Supernova' alternative.  I like this- I sit at the higher end of the weight range and can buy equipment which suits me and enables me to sail to the best of my abilities against guys weighing 70kg doing exactly the same thing at the softer end of the mast chart.

Buy wisely and you won't lose your money.  Despite the proliferation of new designs that may or may not be better, used Lasers and Solos consistently hold their value and depreciate in line with their expendable parts- in other words it's cheap sailing, once you've dealt with the initial outlay.

There's room for a kid in the front.  But it won't give them much to do.  So if you're looking for a versatile boat, it's not the best.  A mirror, feva, graduate or miracle might be better for versatile cruising- one adult, one little kid.