I've been using Fidelity for my 401(k) and overall, it's been a positive experience. Their platform is quite user-friendly, making it easy for someone current to retirement planning to navigate their services. They offer a wide range of investment options which allows for good diversification of your portfolio.
Additionally, I've found their customer service to be very helpful and responsive. They provide comprehensive support and resources that can guide you in making informed decisions about your investments. The main drawback might be the fees associated with some funds or services, so it's worth taking a close look at the cost structure and comparing it with other providers before making a decision.